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CVE-2026-32178 (GCVE-0-2026-32178)
Vulnerability from cvelistv5 – Published: 2026-04-14 16:57 – Updated: 2026-04-15 10:43
VLAI?
EPSS
Title
.NET Spoofing Vulnerability
Summary
Improper neutralization of special elements in .NET allows an unauthorized attacker to perform spoofing over a network.
Severity ?
CWE
- CWE-138 - Improper Neutralization of Special Elements
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | |||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Microsoft | .NET 10.0 |
Affected:
10.0.0 , < 10.0.6
(custom)
|
|||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||
Date Public ?
2026-04-14 14:00
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NCSC-2026-0114
Vulnerability from csaf_ncscnl - Published: 2026-04-14 19:18 - Updated: 2026-04-14 19:18Summary
Kwetsbaarheden verholpen in Microsoft Developer tools
Notes
The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions:
NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein.
NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory.
This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings.
Feiten: Microsoft heeft kwetsbaarheden verholpen in .NET, .NET Framework, Visual Studio en PowerShell.
Interpretaties: Een kwaadwillende kan de kwetsbaarheden misbruiken om aanvallen uit te voeren die kunnen leiden tot de volgende categorieën schade:
- Denial-of-Service (DoS)
- Toegang tot gevoelige gegevens
- Omzeilen van een beveiligingsmaatregel
- Spoofing
```
.NET, .NET Framework, Visual Studio:
|----------------|------|-------------------------------------|
| CVE-ID | CVSS | Impact |
|----------------|------|-------------------------------------|
| CVE-2026-33116 | 7,50 | Denial-of-Service |
|----------------|------|-------------------------------------|
Microsoft PowerShell:
|----------------|------|-------------------------------------|
| CVE-ID | CVSS | Impact |
|----------------|------|-------------------------------------|
| CVE-2026-26143 | 7,80 | Omzeilen van beveiligingsmaatregel |
|----------------|------|-------------------------------------|
GitHub Copilot and Visual Studio Code:
|----------------|------|-------------------------------------|
| CVE-ID | CVSS | Impact |
|----------------|------|-------------------------------------|
| CVE-2026-23653 | 5,70 | Toegang tot gevoelige gegevens |
|----------------|------|-------------------------------------|
.NET and Visual Studio:
|----------------|------|-------------------------------------|
| CVE-ID | CVSS | Impact |
|----------------|------|-------------------------------------|
| CVE-2026-32203 | 7,50 | Denial-of-Service |
|----------------|------|-------------------------------------|
.NET Framework:
|----------------|------|-------------------------------------|
| CVE-ID | CVSS | Impact |
|----------------|------|-------------------------------------|
| CVE-2026-32226 | 5,90 | Denial-of-Service |
| CVE-2026-23666 | 7,50 | Denial-of-Service |
|----------------|------|-------------------------------------|
.NET:
|----------------|------|-------------------------------------|
| CVE-ID | CVSS | Impact |
|----------------|------|-------------------------------------|
| CVE-2026-32178 | 7,50 | Voordoen als andere gebruiker |
| CVE-2026-26171 | 7,50 | Denial-of-Service |
|----------------|------|-------------------------------------|
```
Oplossingen: Microsoft heeft updates beschikbaar gesteld waarmee de beschreven kwetsbaarheden worden verholpen. We raden u aan om deze updates te installeren. Meer informatie over de kwetsbaarheden, de installatie van de updates en eventuele work-arounds vindt u op:
https://portal.msrc.microsoft.com/en-us/security-guidance
Kans: medium
Schade: high
CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-755: Improper Handling of Exceptional Conditions
CWE-400: Uncontrolled Resource Consumption
CWE-611: Improper Restriction of XML External Entity Reference
CWE-138: Improper Neutralization of Special Elements
CWE-121: Stack-based Buffer Overflow
CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
CWE-20: Improper Input Validation
Improper neutralization of special elements in commands ('command injection') in GitHub Copilot and Visual Studio Code allows authorized attackers to disclose information over a network.
CWE-77 - Improper Neutralization of Special Elements used in a Command ('Command Injection')A race condition in the .NET Framework's concurrent execution of shared resources allows unauthorized attackers to cause a denial of service over a network.
Improper input validation in Microsoft PowerShell enables a local unauthorized attacker to bypass security features, potentially compromising system integrity.
Uncontrolled resource consumption vulnerabilities in the .NET framework allow unauthorized attackers to cause denial of service conditions over a network by exhausting system resources.
CWE-611 - Improper Restriction of XML External Entity ReferenceImproper neutralization of special elements in the .NET framework allows unauthorized attackers to conduct network spoofing attacks, compromising network integrity and security.
A stack-based buffer overflow vulnerability in .NET and Visual Studio allows an unauthorized attacker to cause a denial of service over a network.
CWE-121 - Stack-based Buffer OverflowA race condition in the .NET Framework's concurrent execution of shared resources allows unauthorized attackers to cause a denial of service over a network.
CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')An infinite loop vulnerability in .NET, .NET Framework, and Visual Studio can be exploited by unauthorized attackers to cause a denial of service over a network.
CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')References
{
"document": {
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"tlp": {
"label": "WHITE"
}
},
"lang": "nl",
"notes": [
{
"category": "legal_disclaimer",
"text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions:\n\n NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein.\n\n NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory.\n This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
},
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"category": "description",
"text": "Microsoft heeft kwetsbaarheden verholpen in .NET, .NET Framework, Visual Studio en PowerShell.",
"title": "Feiten"
},
{
"category": "description",
"text": "Een kwaadwillende kan de kwetsbaarheden misbruiken om aanvallen uit te voeren die kunnen leiden tot de volgende categorie\u00ebn schade:\n\n- Denial-of-Service (DoS)\n- Toegang tot gevoelige gegevens\n- Omzeilen van een beveiligingsmaatregel\n- Spoofing\n\n```\n.NET, .NET Framework, Visual Studio: \n|----------------|------|-------------------------------------|\n| CVE-ID | CVSS | Impact |\n|----------------|------|-------------------------------------|\n| CVE-2026-33116 | 7,50 | Denial-of-Service | \n|----------------|------|-------------------------------------|\n\nMicrosoft PowerShell: \n|----------------|------|-------------------------------------|\n| CVE-ID | CVSS | Impact |\n|----------------|------|-------------------------------------|\n| CVE-2026-26143 | 7,80 | Omzeilen van beveiligingsmaatregel | \n|----------------|------|-------------------------------------|\n\nGitHub Copilot and Visual Studio Code: \n|----------------|------|-------------------------------------|\n| CVE-ID | CVSS | Impact |\n|----------------|------|-------------------------------------|\n| CVE-2026-23653 | 5,70 | Toegang tot gevoelige gegevens | \n|----------------|------|-------------------------------------|\n\n.NET and Visual Studio: \n|----------------|------|-------------------------------------|\n| CVE-ID | CVSS | Impact |\n|----------------|------|-------------------------------------|\n| CVE-2026-32203 | 7,50 | Denial-of-Service | \n|----------------|------|-------------------------------------|\n\n.NET Framework: \n|----------------|------|-------------------------------------|\n| CVE-ID | CVSS | Impact |\n|----------------|------|-------------------------------------|\n| CVE-2026-32226 | 5,90 | Denial-of-Service | \n| CVE-2026-23666 | 7,50 | Denial-of-Service | \n|----------------|------|-------------------------------------|\n\n.NET: \n|----------------|------|-------------------------------------|\n| CVE-ID | CVSS | Impact |\n|----------------|------|-------------------------------------|\n| CVE-2026-32178 | 7,50 | Voordoen als andere gebruiker | \n| CVE-2026-26171 | 7,50 | Denial-of-Service | \n|----------------|------|-------------------------------------|\n\n```",
"title": "Interpretaties"
},
{
"category": "description",
"text": "Microsoft heeft updates beschikbaar gesteld waarmee de beschreven kwetsbaarheden worden verholpen. We raden u aan om deze updates te installeren. Meer informatie over de kwetsbaarheden, de installatie van de updates en eventuele work-arounds vindt u op:\n\nhttps://portal.msrc.microsoft.com/en-us/security-guidance",
"title": "Oplossingen"
},
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"text": "medium",
"title": "Kans"
},
{
"category": "general",
"text": "high",
"title": "Schade"
},
{
"category": "general",
"text": "Improper Neutralization of Special Elements used in a Command (\u0027Command Injection\u0027)",
"title": "CWE-77"
},
{
"category": "general",
"text": "Improper Handling of Exceptional Conditions",
"title": "CWE-755"
},
{
"category": "general",
"text": "Uncontrolled Resource Consumption",
"title": "CWE-400"
},
{
"category": "general",
"text": "Improper Restriction of XML External Entity Reference",
"title": "CWE-611"
},
{
"category": "general",
"text": "Improper Neutralization of Special Elements",
"title": "CWE-138"
},
{
"category": "general",
"text": "Stack-based Buffer Overflow",
"title": "CWE-121"
},
{
"category": "general",
"text": "Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
"title": "CWE-362"
},
{
"category": "general",
"text": "Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
"title": "CWE-835"
},
{
"category": "general",
"text": "Improper Input Validation",
"title": "CWE-20"
}
],
"publisher": {
"category": "coordinator",
"contact_details": "cert@ncsc.nl",
"name": "Nationaal Cyber Security Centrum",
"namespace": "https://www.ncsc.nl/"
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],
"category": "vendor",
"name": "Microsoft"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2026-23653",
"cwe": {
"id": "CWE-77",
"name": "Improper Neutralization of Special Elements used in a Command (\u0027Command Injection\u0027)"
},
"notes": [
{
"category": "other",
"text": "Improper Neutralization of Special Elements used in a Command (\u0027Command Injection\u0027)",
"title": "CWE-77"
},
{
"category": "description",
"text": "Improper neutralization of special elements in commands (\u0027command injection\u0027) in GitHub Copilot and Visual Studio Code allows authorized attackers to disclose information over a network.",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
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"CSAFPID-2",
"CSAFPID-3",
"CSAFPID-4",
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"CSAFPID-7",
"CSAFPID-8",
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"CSAFPID-19",
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"CSAFPID-64",
"CSAFPID-65",
"CSAFPID-66",
"CSAFPID-67",
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"CSAFPID-69",
"CSAFPID-70",
"CSAFPID-71",
"CSAFPID-72",
"CSAFPID-73",
"CSAFPID-74"
]
},
"references": [
{
"category": "self",
"summary": "CVE-2026-23653 | NCSC-NL Website",
"url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-23653.json"
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 5.7,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C",
"version": "3.1"
},
"products": [
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"CSAFPID-2",
"CSAFPID-3",
"CSAFPID-4",
"CSAFPID-5",
"CSAFPID-6",
"CSAFPID-7",
"CSAFPID-8",
"CSAFPID-9",
"CSAFPID-10",
"CSAFPID-11",
"CSAFPID-12",
"CSAFPID-13",
"CSAFPID-14",
"CSAFPID-15",
"CSAFPID-16",
"CSAFPID-17",
"CSAFPID-18",
"CSAFPID-19",
"CSAFPID-20",
"CSAFPID-21",
"CSAFPID-22",
"CSAFPID-23",
"CSAFPID-24",
"CSAFPID-25",
"CSAFPID-26",
"CSAFPID-27",
"CSAFPID-28",
"CSAFPID-29",
"CSAFPID-30",
"CSAFPID-31",
"CSAFPID-32",
"CSAFPID-33",
"CSAFPID-34",
"CSAFPID-35",
"CSAFPID-36",
"CSAFPID-37",
"CSAFPID-38",
"CSAFPID-39",
"CSAFPID-40",
"CSAFPID-41",
"CSAFPID-42",
"CSAFPID-43",
"CSAFPID-44",
"CSAFPID-45",
"CSAFPID-46",
"CSAFPID-47",
"CSAFPID-48",
"CSAFPID-49",
"CSAFPID-50",
"CSAFPID-51",
"CSAFPID-52",
"CSAFPID-53",
"CSAFPID-54",
"CSAFPID-55",
"CSAFPID-56",
"CSAFPID-57",
"CSAFPID-58",
"CSAFPID-59",
"CSAFPID-60",
"CSAFPID-61",
"CSAFPID-62",
"CSAFPID-63",
"CSAFPID-64",
"CSAFPID-65",
"CSAFPID-66",
"CSAFPID-67",
"CSAFPID-68",
"CSAFPID-69",
"CSAFPID-70",
"CSAFPID-71",
"CSAFPID-72",
"CSAFPID-73",
"CSAFPID-74"
]
}
],
"title": "CVE-2026-23653"
},
{
"cve": "CVE-2026-23666",
"notes": [
{
"category": "description",
"text": "A race condition in the .NET Framework\u0027s concurrent execution of shared resources allows unauthorized attackers to cause a denial of service over a network.",
"title": "Summary"
}
],
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"known_affected": [
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"CSAFPID-2",
"CSAFPID-3",
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"CSAFPID-69",
"CSAFPID-70",
"CSAFPID-71",
"CSAFPID-72",
"CSAFPID-73",
"CSAFPID-74"
]
},
"references": [
{
"category": "self",
"summary": "CVE-2026-23666 | NCSC-NL Website",
"url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-23666.json"
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 7.5,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C",
"version": "3.1"
},
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"CSAFPID-3",
"CSAFPID-4",
"CSAFPID-5",
"CSAFPID-6",
"CSAFPID-7",
"CSAFPID-8",
"CSAFPID-9",
"CSAFPID-10",
"CSAFPID-11",
"CSAFPID-12",
"CSAFPID-13",
"CSAFPID-14",
"CSAFPID-15",
"CSAFPID-16",
"CSAFPID-17",
"CSAFPID-18",
"CSAFPID-19",
"CSAFPID-20",
"CSAFPID-21",
"CSAFPID-22",
"CSAFPID-23",
"CSAFPID-24",
"CSAFPID-25",
"CSAFPID-26",
"CSAFPID-27",
"CSAFPID-28",
"CSAFPID-29",
"CSAFPID-30",
"CSAFPID-31",
"CSAFPID-32",
"CSAFPID-33",
"CSAFPID-34",
"CSAFPID-35",
"CSAFPID-36",
"CSAFPID-37",
"CSAFPID-38",
"CSAFPID-39",
"CSAFPID-40",
"CSAFPID-41",
"CSAFPID-42",
"CSAFPID-43",
"CSAFPID-44",
"CSAFPID-45",
"CSAFPID-46",
"CSAFPID-47",
"CSAFPID-48",
"CSAFPID-49",
"CSAFPID-50",
"CSAFPID-51",
"CSAFPID-52",
"CSAFPID-53",
"CSAFPID-54",
"CSAFPID-55",
"CSAFPID-56",
"CSAFPID-57",
"CSAFPID-58",
"CSAFPID-59",
"CSAFPID-60",
"CSAFPID-61",
"CSAFPID-62",
"CSAFPID-63",
"CSAFPID-64",
"CSAFPID-65",
"CSAFPID-66",
"CSAFPID-67",
"CSAFPID-68",
"CSAFPID-69",
"CSAFPID-70",
"CSAFPID-71",
"CSAFPID-72",
"CSAFPID-73",
"CSAFPID-74"
]
}
],
"title": "CVE-2026-23666"
},
{
"cve": "CVE-2026-26143",
"notes": [
{
"category": "description",
"text": "Improper input validation in Microsoft PowerShell enables a local unauthorized attacker to bypass security features, potentially compromising system integrity.",
"title": "Summary"
}
],
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"CSAFPID-3",
"CSAFPID-4",
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"CSAFPID-71",
"CSAFPID-72",
"CSAFPID-73",
"CSAFPID-74"
]
},
"references": [
{
"category": "self",
"summary": "CVE-2026-26143 | NCSC-NL Website",
"url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-26143.json"
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
"version": "3.1"
},
"products": [
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"CSAFPID-2",
"CSAFPID-3",
"CSAFPID-4",
"CSAFPID-5",
"CSAFPID-6",
"CSAFPID-7",
"CSAFPID-8",
"CSAFPID-9",
"CSAFPID-10",
"CSAFPID-11",
"CSAFPID-12",
"CSAFPID-13",
"CSAFPID-14",
"CSAFPID-15",
"CSAFPID-16",
"CSAFPID-17",
"CSAFPID-18",
"CSAFPID-19",
"CSAFPID-20",
"CSAFPID-21",
"CSAFPID-22",
"CSAFPID-23",
"CSAFPID-24",
"CSAFPID-25",
"CSAFPID-26",
"CSAFPID-27",
"CSAFPID-28",
"CSAFPID-29",
"CSAFPID-30",
"CSAFPID-31",
"CSAFPID-32",
"CSAFPID-33",
"CSAFPID-34",
"CSAFPID-35",
"CSAFPID-36",
"CSAFPID-37",
"CSAFPID-38",
"CSAFPID-39",
"CSAFPID-40",
"CSAFPID-41",
"CSAFPID-42",
"CSAFPID-43",
"CSAFPID-44",
"CSAFPID-45",
"CSAFPID-46",
"CSAFPID-47",
"CSAFPID-48",
"CSAFPID-49",
"CSAFPID-50",
"CSAFPID-51",
"CSAFPID-52",
"CSAFPID-53",
"CSAFPID-54",
"CSAFPID-55",
"CSAFPID-56",
"CSAFPID-57",
"CSAFPID-58",
"CSAFPID-59",
"CSAFPID-60",
"CSAFPID-61",
"CSAFPID-62",
"CSAFPID-63",
"CSAFPID-64",
"CSAFPID-65",
"CSAFPID-66",
"CSAFPID-67",
"CSAFPID-68",
"CSAFPID-69",
"CSAFPID-70",
"CSAFPID-71",
"CSAFPID-72",
"CSAFPID-73",
"CSAFPID-74"
]
}
],
"title": "CVE-2026-26143"
},
{
"cve": "CVE-2026-26171",
"cwe": {
"id": "CWE-611",
"name": "Improper Restriction of XML External Entity Reference"
},
"notes": [
{
"category": "other",
"text": "Improper Restriction of XML External Entity Reference",
"title": "CWE-611"
},
{
"category": "description",
"text": "Uncontrolled resource consumption vulnerabilities in the .NET framework allow unauthorized attackers to cause denial of service conditions over a network by exhausting system resources.",
"title": "Summary"
}
],
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"CSAFPID-1",
"CSAFPID-2",
"CSAFPID-3",
"CSAFPID-4",
"CSAFPID-5",
"CSAFPID-6",
"CSAFPID-7",
"CSAFPID-8",
"CSAFPID-9",
"CSAFPID-10",
"CSAFPID-11",
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"CSAFPID-13",
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"CSAFPID-18",
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"CSAFPID-20",
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"CSAFPID-22",
"CSAFPID-23",
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"CSAFPID-25",
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"CSAFPID-37",
"CSAFPID-38",
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"CSAFPID-40",
"CSAFPID-41",
"CSAFPID-42",
"CSAFPID-43",
"CSAFPID-44",
"CSAFPID-45",
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"CSAFPID-47",
"CSAFPID-48",
"CSAFPID-49",
"CSAFPID-50",
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"CSAFPID-52",
"CSAFPID-53",
"CSAFPID-54",
"CSAFPID-55",
"CSAFPID-56",
"CSAFPID-57",
"CSAFPID-58",
"CSAFPID-59",
"CSAFPID-60",
"CSAFPID-61",
"CSAFPID-62",
"CSAFPID-63",
"CSAFPID-64",
"CSAFPID-65",
"CSAFPID-66",
"CSAFPID-67",
"CSAFPID-68",
"CSAFPID-69",
"CSAFPID-70",
"CSAFPID-71",
"CSAFPID-72",
"CSAFPID-73",
"CSAFPID-74"
]
},
"references": [
{
"category": "self",
"summary": "CVE-2026-26171 | NCSC-NL Website",
"url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-26171.json"
}
],
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{
"cvss_v3": {
"baseScore": 7.5,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C",
"version": "3.1"
},
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"CSAFPID-2",
"CSAFPID-3",
"CSAFPID-4",
"CSAFPID-5",
"CSAFPID-6",
"CSAFPID-7",
"CSAFPID-8",
"CSAFPID-9",
"CSAFPID-10",
"CSAFPID-11",
"CSAFPID-12",
"CSAFPID-13",
"CSAFPID-14",
"CSAFPID-15",
"CSAFPID-16",
"CSAFPID-17",
"CSAFPID-18",
"CSAFPID-19",
"CSAFPID-20",
"CSAFPID-21",
"CSAFPID-22",
"CSAFPID-23",
"CSAFPID-24",
"CSAFPID-25",
"CSAFPID-26",
"CSAFPID-27",
"CSAFPID-28",
"CSAFPID-29",
"CSAFPID-30",
"CSAFPID-31",
"CSAFPID-32",
"CSAFPID-33",
"CSAFPID-34",
"CSAFPID-35",
"CSAFPID-36",
"CSAFPID-37",
"CSAFPID-38",
"CSAFPID-39",
"CSAFPID-40",
"CSAFPID-41",
"CSAFPID-42",
"CSAFPID-43",
"CSAFPID-44",
"CSAFPID-45",
"CSAFPID-46",
"CSAFPID-47",
"CSAFPID-48",
"CSAFPID-49",
"CSAFPID-50",
"CSAFPID-51",
"CSAFPID-52",
"CSAFPID-53",
"CSAFPID-54",
"CSAFPID-55",
"CSAFPID-56",
"CSAFPID-57",
"CSAFPID-58",
"CSAFPID-59",
"CSAFPID-60",
"CSAFPID-61",
"CSAFPID-62",
"CSAFPID-63",
"CSAFPID-64",
"CSAFPID-65",
"CSAFPID-66",
"CSAFPID-67",
"CSAFPID-68",
"CSAFPID-69",
"CSAFPID-70",
"CSAFPID-71",
"CSAFPID-72",
"CSAFPID-73",
"CSAFPID-74"
]
}
],
"title": "CVE-2026-26171"
},
{
"cve": "CVE-2026-32178",
"notes": [
{
"category": "description",
"text": "Improper neutralization of special elements in the .NET framework allows unauthorized attackers to conduct network spoofing attacks, compromising network integrity and security.",
"title": "Summary"
}
],
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"CSAFPID-2",
"CSAFPID-3",
"CSAFPID-4",
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"CSAFPID-54",
"CSAFPID-55",
"CSAFPID-56",
"CSAFPID-57",
"CSAFPID-58",
"CSAFPID-59",
"CSAFPID-60",
"CSAFPID-61",
"CSAFPID-62",
"CSAFPID-63",
"CSAFPID-64",
"CSAFPID-65",
"CSAFPID-66",
"CSAFPID-67",
"CSAFPID-68",
"CSAFPID-69",
"CSAFPID-70",
"CSAFPID-71",
"CSAFPID-72",
"CSAFPID-73",
"CSAFPID-74"
]
},
"references": [
{
"category": "self",
"summary": "CVE-2026-32178 | NCSC-NL Website",
"url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-32178.json"
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 7.5,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C",
"version": "3.1"
},
"products": [
"CSAFPID-1",
"CSAFPID-2",
"CSAFPID-3",
"CSAFPID-4",
"CSAFPID-5",
"CSAFPID-6",
"CSAFPID-7",
"CSAFPID-8",
"CSAFPID-9",
"CSAFPID-10",
"CSAFPID-11",
"CSAFPID-12",
"CSAFPID-13",
"CSAFPID-14",
"CSAFPID-15",
"CSAFPID-16",
"CSAFPID-17",
"CSAFPID-18",
"CSAFPID-19",
"CSAFPID-20",
"CSAFPID-21",
"CSAFPID-22",
"CSAFPID-23",
"CSAFPID-24",
"CSAFPID-25",
"CSAFPID-26",
"CSAFPID-27",
"CSAFPID-28",
"CSAFPID-29",
"CSAFPID-30",
"CSAFPID-31",
"CSAFPID-32",
"CSAFPID-33",
"CSAFPID-34",
"CSAFPID-35",
"CSAFPID-36",
"CSAFPID-37",
"CSAFPID-38",
"CSAFPID-39",
"CSAFPID-40",
"CSAFPID-41",
"CSAFPID-42",
"CSAFPID-43",
"CSAFPID-44",
"CSAFPID-45",
"CSAFPID-46",
"CSAFPID-47",
"CSAFPID-48",
"CSAFPID-49",
"CSAFPID-50",
"CSAFPID-51",
"CSAFPID-52",
"CSAFPID-53",
"CSAFPID-54",
"CSAFPID-55",
"CSAFPID-56",
"CSAFPID-57",
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"CSAFPID-62",
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"CSAFPID-64",
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"CSAFPID-66",
"CSAFPID-67",
"CSAFPID-68",
"CSAFPID-69",
"CSAFPID-70",
"CSAFPID-71",
"CSAFPID-72",
"CSAFPID-73",
"CSAFPID-74"
]
}
],
"title": "CVE-2026-32178"
},
{
"cve": "CVE-2026-32203",
"cwe": {
"id": "CWE-121",
"name": "Stack-based Buffer Overflow"
},
"notes": [
{
"category": "other",
"text": "Stack-based Buffer Overflow",
"title": "CWE-121"
},
{
"category": "description",
"text": "A stack-based buffer overflow vulnerability in .NET and Visual Studio allows an unauthorized attacker to cause a denial of service over a network.",
"title": "Summary"
}
],
"product_status": {
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"CSAFPID-1",
"CSAFPID-2",
"CSAFPID-3",
"CSAFPID-4",
"CSAFPID-5",
"CSAFPID-6",
"CSAFPID-7",
"CSAFPID-8",
"CSAFPID-9",
"CSAFPID-10",
"CSAFPID-11",
"CSAFPID-12",
"CSAFPID-13",
"CSAFPID-14",
"CSAFPID-15",
"CSAFPID-16",
"CSAFPID-17",
"CSAFPID-18",
"CSAFPID-19",
"CSAFPID-20",
"CSAFPID-21",
"CSAFPID-22",
"CSAFPID-23",
"CSAFPID-24",
"CSAFPID-25",
"CSAFPID-26",
"CSAFPID-27",
"CSAFPID-28",
"CSAFPID-29",
"CSAFPID-30",
"CSAFPID-31",
"CSAFPID-32",
"CSAFPID-33",
"CSAFPID-34",
"CSAFPID-35",
"CSAFPID-36",
"CSAFPID-37",
"CSAFPID-38",
"CSAFPID-39",
"CSAFPID-40",
"CSAFPID-41",
"CSAFPID-42",
"CSAFPID-43",
"CSAFPID-44",
"CSAFPID-45",
"CSAFPID-46",
"CSAFPID-47",
"CSAFPID-48",
"CSAFPID-49",
"CSAFPID-50",
"CSAFPID-51",
"CSAFPID-52",
"CSAFPID-53",
"CSAFPID-54",
"CSAFPID-55",
"CSAFPID-56",
"CSAFPID-57",
"CSAFPID-58",
"CSAFPID-59",
"CSAFPID-60",
"CSAFPID-61",
"CSAFPID-62",
"CSAFPID-63",
"CSAFPID-64",
"CSAFPID-65",
"CSAFPID-66",
"CSAFPID-67",
"CSAFPID-68",
"CSAFPID-69",
"CSAFPID-70",
"CSAFPID-71",
"CSAFPID-72",
"CSAFPID-73",
"CSAFPID-74"
]
},
"references": [
{
"category": "self",
"summary": "CVE-2026-32203 | NCSC-NL Website",
"url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-32203.json"
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 7.5,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C",
"version": "3.1"
},
"products": [
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"CSAFPID-2",
"CSAFPID-3",
"CSAFPID-4",
"CSAFPID-5",
"CSAFPID-6",
"CSAFPID-7",
"CSAFPID-8",
"CSAFPID-9",
"CSAFPID-10",
"CSAFPID-11",
"CSAFPID-12",
"CSAFPID-13",
"CSAFPID-14",
"CSAFPID-15",
"CSAFPID-16",
"CSAFPID-17",
"CSAFPID-18",
"CSAFPID-19",
"CSAFPID-20",
"CSAFPID-21",
"CSAFPID-22",
"CSAFPID-23",
"CSAFPID-24",
"CSAFPID-25",
"CSAFPID-26",
"CSAFPID-27",
"CSAFPID-28",
"CSAFPID-29",
"CSAFPID-30",
"CSAFPID-31",
"CSAFPID-32",
"CSAFPID-33",
"CSAFPID-34",
"CSAFPID-35",
"CSAFPID-36",
"CSAFPID-37",
"CSAFPID-38",
"CSAFPID-39",
"CSAFPID-40",
"CSAFPID-41",
"CSAFPID-42",
"CSAFPID-43",
"CSAFPID-44",
"CSAFPID-45",
"CSAFPID-46",
"CSAFPID-47",
"CSAFPID-48",
"CSAFPID-49",
"CSAFPID-50",
"CSAFPID-51",
"CSAFPID-52",
"CSAFPID-53",
"CSAFPID-54",
"CSAFPID-55",
"CSAFPID-56",
"CSAFPID-57",
"CSAFPID-58",
"CSAFPID-59",
"CSAFPID-60",
"CSAFPID-61",
"CSAFPID-62",
"CSAFPID-63",
"CSAFPID-64",
"CSAFPID-65",
"CSAFPID-66",
"CSAFPID-67",
"CSAFPID-68",
"CSAFPID-69",
"CSAFPID-70",
"CSAFPID-71",
"CSAFPID-72",
"CSAFPID-73",
"CSAFPID-74"
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}
],
"title": "CVE-2026-32203"
},
{
"cve": "CVE-2026-32226",
"cwe": {
"id": "CWE-362",
"name": "Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)"
},
"notes": [
{
"category": "other",
"text": "Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
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},
{
"category": "description",
"text": "A race condition in the .NET Framework\u0027s concurrent execution of shared resources allows unauthorized attackers to cause a denial of service over a network.",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"CSAFPID-1",
"CSAFPID-2",
"CSAFPID-3",
"CSAFPID-4",
"CSAFPID-5",
"CSAFPID-6",
"CSAFPID-7",
"CSAFPID-8",
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"CSAFPID-10",
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"CSAFPID-12",
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"CSAFPID-15",
"CSAFPID-16",
"CSAFPID-17",
"CSAFPID-18",
"CSAFPID-19",
"CSAFPID-20",
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"CSAFPID-22",
"CSAFPID-23",
"CSAFPID-24",
"CSAFPID-25",
"CSAFPID-26",
"CSAFPID-27",
"CSAFPID-28",
"CSAFPID-29",
"CSAFPID-30",
"CSAFPID-31",
"CSAFPID-32",
"CSAFPID-33",
"CSAFPID-34",
"CSAFPID-35",
"CSAFPID-36",
"CSAFPID-37",
"CSAFPID-38",
"CSAFPID-39",
"CSAFPID-40",
"CSAFPID-41",
"CSAFPID-42",
"CSAFPID-43",
"CSAFPID-44",
"CSAFPID-45",
"CSAFPID-46",
"CSAFPID-47",
"CSAFPID-48",
"CSAFPID-49",
"CSAFPID-50",
"CSAFPID-51",
"CSAFPID-52",
"CSAFPID-53",
"CSAFPID-54",
"CSAFPID-55",
"CSAFPID-56",
"CSAFPID-57",
"CSAFPID-58",
"CSAFPID-59",
"CSAFPID-60",
"CSAFPID-61",
"CSAFPID-62",
"CSAFPID-63",
"CSAFPID-64",
"CSAFPID-65",
"CSAFPID-66",
"CSAFPID-67",
"CSAFPID-68",
"CSAFPID-69",
"CSAFPID-70",
"CSAFPID-71",
"CSAFPID-72",
"CSAFPID-73",
"CSAFPID-74"
]
},
"references": [
{
"category": "self",
"summary": "CVE-2026-32226 | NCSC-NL Website",
"url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-32226.json"
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C",
"version": "3.1"
},
"products": [
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"CSAFPID-2",
"CSAFPID-3",
"CSAFPID-4",
"CSAFPID-5",
"CSAFPID-6",
"CSAFPID-7",
"CSAFPID-8",
"CSAFPID-9",
"CSAFPID-10",
"CSAFPID-11",
"CSAFPID-12",
"CSAFPID-13",
"CSAFPID-14",
"CSAFPID-15",
"CSAFPID-16",
"CSAFPID-17",
"CSAFPID-18",
"CSAFPID-19",
"CSAFPID-20",
"CSAFPID-21",
"CSAFPID-22",
"CSAFPID-23",
"CSAFPID-24",
"CSAFPID-25",
"CSAFPID-26",
"CSAFPID-27",
"CSAFPID-28",
"CSAFPID-29",
"CSAFPID-30",
"CSAFPID-31",
"CSAFPID-32",
"CSAFPID-33",
"CSAFPID-34",
"CSAFPID-35",
"CSAFPID-36",
"CSAFPID-37",
"CSAFPID-38",
"CSAFPID-39",
"CSAFPID-40",
"CSAFPID-41",
"CSAFPID-42",
"CSAFPID-43",
"CSAFPID-44",
"CSAFPID-45",
"CSAFPID-46",
"CSAFPID-47",
"CSAFPID-48",
"CSAFPID-49",
"CSAFPID-50",
"CSAFPID-51",
"CSAFPID-52",
"CSAFPID-53",
"CSAFPID-54",
"CSAFPID-55",
"CSAFPID-56",
"CSAFPID-57",
"CSAFPID-58",
"CSAFPID-59",
"CSAFPID-60",
"CSAFPID-61",
"CSAFPID-62",
"CSAFPID-63",
"CSAFPID-64",
"CSAFPID-65",
"CSAFPID-66",
"CSAFPID-67",
"CSAFPID-68",
"CSAFPID-69",
"CSAFPID-70",
"CSAFPID-71",
"CSAFPID-72",
"CSAFPID-73",
"CSAFPID-74"
]
}
],
"title": "CVE-2026-32226"
},
{
"cve": "CVE-2026-33116",
"cwe": {
"id": "CWE-835",
"name": "Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)"
},
"notes": [
{
"category": "other",
"text": "Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
"title": "CWE-835"
},
{
"category": "description",
"text": "An infinite loop vulnerability in .NET, .NET Framework, and Visual Studio can be exploited by unauthorized attackers to cause a denial of service over a network.",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"CSAFPID-1",
"CSAFPID-2",
"CSAFPID-3",
"CSAFPID-4",
"CSAFPID-5",
"CSAFPID-6",
"CSAFPID-7",
"CSAFPID-8",
"CSAFPID-9",
"CSAFPID-10",
"CSAFPID-11",
"CSAFPID-12",
"CSAFPID-13",
"CSAFPID-14",
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"CSAFPID-20",
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"CSAFPID-28",
"CSAFPID-29",
"CSAFPID-30",
"CSAFPID-31",
"CSAFPID-32",
"CSAFPID-33",
"CSAFPID-34",
"CSAFPID-35",
"CSAFPID-36",
"CSAFPID-37",
"CSAFPID-38",
"CSAFPID-39",
"CSAFPID-40",
"CSAFPID-41",
"CSAFPID-42",
"CSAFPID-43",
"CSAFPID-44",
"CSAFPID-45",
"CSAFPID-46",
"CSAFPID-47",
"CSAFPID-48",
"CSAFPID-49",
"CSAFPID-50",
"CSAFPID-51",
"CSAFPID-52",
"CSAFPID-53",
"CSAFPID-54",
"CSAFPID-55",
"CSAFPID-56",
"CSAFPID-57",
"CSAFPID-58",
"CSAFPID-59",
"CSAFPID-60",
"CSAFPID-61",
"CSAFPID-62",
"CSAFPID-63",
"CSAFPID-64",
"CSAFPID-65",
"CSAFPID-66",
"CSAFPID-67",
"CSAFPID-68",
"CSAFPID-69",
"CSAFPID-70",
"CSAFPID-71",
"CSAFPID-72",
"CSAFPID-73",
"CSAFPID-74"
]
},
"references": [
{
"category": "self",
"summary": "CVE-2026-33116 | NCSC-NL Website",
"url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-33116.json"
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 7.5,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C",
"version": "3.1"
},
"products": [
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"CSAFPID-2",
"CSAFPID-3",
"CSAFPID-4",
"CSAFPID-5",
"CSAFPID-6",
"CSAFPID-7",
"CSAFPID-8",
"CSAFPID-9",
"CSAFPID-10",
"CSAFPID-11",
"CSAFPID-12",
"CSAFPID-13",
"CSAFPID-14",
"CSAFPID-15",
"CSAFPID-16",
"CSAFPID-17",
"CSAFPID-18",
"CSAFPID-19",
"CSAFPID-20",
"CSAFPID-21",
"CSAFPID-22",
"CSAFPID-23",
"CSAFPID-24",
"CSAFPID-25",
"CSAFPID-26",
"CSAFPID-27",
"CSAFPID-28",
"CSAFPID-29",
"CSAFPID-30",
"CSAFPID-31",
"CSAFPID-32",
"CSAFPID-33",
"CSAFPID-34",
"CSAFPID-35",
"CSAFPID-36",
"CSAFPID-37",
"CSAFPID-38",
"CSAFPID-39",
"CSAFPID-40",
"CSAFPID-41",
"CSAFPID-42",
"CSAFPID-43",
"CSAFPID-44",
"CSAFPID-45",
"CSAFPID-46",
"CSAFPID-47",
"CSAFPID-48",
"CSAFPID-49",
"CSAFPID-50",
"CSAFPID-51",
"CSAFPID-52",
"CSAFPID-53",
"CSAFPID-54",
"CSAFPID-55",
"CSAFPID-56",
"CSAFPID-57",
"CSAFPID-58",
"CSAFPID-59",
"CSAFPID-60",
"CSAFPID-61",
"CSAFPID-62",
"CSAFPID-63",
"CSAFPID-64",
"CSAFPID-65",
"CSAFPID-66",
"CSAFPID-67",
"CSAFPID-68",
"CSAFPID-69",
"CSAFPID-70",
"CSAFPID-71",
"CSAFPID-72",
"CSAFPID-73",
"CSAFPID-74"
]
}
],
"title": "CVE-2026-33116"
}
]
}
MSRC_CVE-2026-32178
Vulnerability from csaf_microsoft - Published: 2026-04-14 07:00 - Updated: 2026-04-14 07:00Summary
.NET Spoofing Vulnerability
Severity
Important
Notes
Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
Customer Action: Required. The vulnerability documented by this CVE requires customer action to resolve.
CWE-138
- Improper Neutralization of Special Elements
Vendor Fix
17.12.19:Security Update:https://learn.microsoft.com/en-us/visualstudio/releases/2022/release-notes
https://learn.microsoft.com/en-us/visualstudio/re…
Vendor Fix
17.14.30:Security Update:https://learn.microsoft.com/en-us/visualstudio/releases/2022/release-notes
https://learn.microsoft.com/en-us/visualstudio/re…
Vendor Fix
10.0.6:Security Update:https://support.microsoft.com/help/5086095
https://support.microsoft.com/help/5086095
Vendor Fix
8.0.26:Security Update:https://support.microsoft.com/help/5086096
https://support.microsoft.com/help/5086096
Vendor Fix
9.0.15:Security Update:https://support.microsoft.com/help/5086097
https://support.microsoft.com/help/5086097
References
| URL | Category | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||
Acknowledgments
Ludvig Pedersen
{
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"text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
"title": "Disclaimer"
},
{
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"text": "Required. The vulnerability documented by this CVE requires customer action to resolve.",
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"contact_details": "secure@microsoft.com",
"name": "Microsoft Security Response Center",
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"references": [
{
"category": "self",
"summary": "CVE-2026-32178 .NET Spoofing Vulnerability - HTML",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32178"
},
{
"category": "self",
"summary": "CVE-2026-32178 .NET Spoofing Vulnerability - CSAF",
"url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-32178.json"
},
{
"category": "external",
"summary": "Microsoft Exploitability Index",
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FKIE_CVE-2026-32178
Vulnerability from fkie_nvd - Published: 2026-04-14 18:17 - Updated: 2026-04-14 18:17
Severity ?
Summary
Improper neutralization of special elements in .NET allows an unauthorized attacker to perform spoofing over a network.
References
Impacted products
| Vendor | Product | Version |
|---|
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GHSA-VMWF-M9C5-3JVC
Vulnerability from github – Published: 2026-04-14 23:27 – Updated: 2026-04-14 23:27
VLAI?
Summary
Microsoft Security Advisory CVE-2026-32178 – .NET Spoofing Vulnerability
Details
Executive Summary:
Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 8.0, .NET 9.0, and .NET 10.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.
A vulnerability exists in System.Net.Mail where specially crafted data allows an unauthorized attacker to perform a spoofing attack over the network.
Announcement
Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/12345
CVSS Details
- Version: 3.1
- Severity: High
- Score: 7.5
- Vector: 7.5: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
- Weakness: CWE-138: Improper Neutralization of Special Elements
Affected Platforms
- Platforms: All
- Architectures: All
Affected Packages
The vulnerability affects any Microsoft .NET project if it uses any of affected package versions listed below
.NET 8
| Package name | Affected version | Patched version |
|---|---|---|
| Microsoft.NetCore.App.Runtime.linux-arm | >= 8.0.0, <= 8.0.25 | 8.0.26 |
| Microsoft.NetCore.App.Runtime.linux-arm64 | >= 8.0.0, <= 8.0.25 | 8.0.26 |
| Microsoft.NetCore.App.Runtime.linux-musl-arm | >= 8.0.0, <= 8.0.25 | 8.0.26 |
| Microsoft.NetCore.App.Runtime.linux-musl-arm64 | >= 8.0.0, <= 8.0.25 | 8.0.26 |
| Microsoft.NetCore.App.Runtime.linux-musl-x64 | >= 8.0.0, <= 8.0.25 | 8.0.26 |
| Microsoft.NetCore.App.Runtime.linux-x64 | >= 8.0.0, <= 8.0.25 | 8.0.26 |
| Microsoft.NetCore.App.Runtime.osx-arm64 | >= 8.0.0, <= 8.0.25 | 8.0.26 |
| Microsoft.NetCore.App.Runtime.osx-x64 | >= 8.0.0, <= 8.0.25 | 8.0.26 |
| Microsoft.NetCore.App.Runtime.win-arm | >= 8.0.0, <= 8.0.25 | 8.0.26 |
| Microsoft.NetCore.App.Runtime.win-arm64 | >= 8.0.0, <= 8.0.25 | 8.0.26 |
| Microsoft.NetCore.App.Runtime.win-x64 | >= 8.0.0, <= 8.0.25 | 8.0.26 |
| Microsoft.NetCore.App.Runtime.win-x86 | >= 8.0.0, <= 8.0.25 | 8.0.26 |
.NET 9
| Package name | Affected version | Patched version |
|---|---|---|
| Microsoft.NetCore.App.Runtime.linux-arm | >= 9.0.0, <= 9.0.14 | 9.0.15 |
| Microsoft.NetCore.App.Runtime.linux-arm64 | >= 9.0.0, <= 9.0.14 | 9.0.15 |
| Microsoft.NetCore.App.Runtime.linux-musl-arm | >= 9.0.0, <= 9.0.14 | 9.0.15 |
| Microsoft.NetCore.App.Runtime.linux-musl-arm64 | >= 9.0.0, <= 9.0.14 | 9.0.15 |
| Microsoft.NetCore.App.Runtime.linux-musl-x64 | >= 9.0.0, <= 9.0.14 | 9.0.15 |
| Microsoft.NetCore.App.Runtime.linux-x64 | >= 9.0.0, <= 9.0.14 | 9.0.15 |
| Microsoft.NetCore.App.Runtime.osx-arm64 | >= 9.0.0, <= 9.0.14 | 9.0.15 |
| Microsoft.NetCore.App.Runtime.osx-x64 | >= 9.0.0, <= 9.0.14 | 9.0.15 |
| Microsoft.NetCore.App.Runtime.win-arm | >= 9.0.0, <= 9.0.14 | 9.0.15 |
| Microsoft.NetCore.App.Runtime.win-arm64 | >= 9.0.0, <= 9.0.14 | 9.0.15 |
| Microsoft.NetCore.App.Runtime.win-x64 | >= 9.0.0, <= 9.0.14 | 9.0.15 |
| Microsoft.NetCore.App.Runtime.win-x86 | >= 9.0.0, <= 9.0.14 | 9.0.15 |
.NET 10
| Package name | Affected version | Patched version |
|---|---|---|
| Microsoft.NetCore.App.Runtime.linux-arm | >= 10.0.0, <= 10.0.5 | 10.0.6 |
| Microsoft.NetCore.App.Runtime.linux-arm64 | >= 10.0.0, <= 10.0.5 | 10.0.6 |
| Microsoft.NetCore.App.Runtime.linux-musl-arm | >= 10.0.0, <= 10.0.5 | 10.0.6 |
| Microsoft.NetCore.App.Runtime.linux-musl-arm64 | >= 10.0.0, <= 10.0.5 | 10.0.6 |
| Microsoft.NetCore.App.Runtime.linux-musl-x64 | >= 10.0.0, <= 10.0.5 | 10.0.6 |
| Microsoft.NetCore.App.Runtime.linux-x64 | >= 10.0.0, <= 10.0.5 | 10.0.6 |
| Microsoft.NetCore.App.Runtime.osx-arm64 | >= 10.0.0, <= 10.0.5 | 10.0.6 |
| Microsoft.NetCore.App.Runtime.osx-x64 | >= 10.0.0, <= 10.0.5 | 10.0.6 |
| Microsoft.NetCore.App.Runtime.win-arm | >= 10.0.0, <= 10.0.5 | 10.0.6 |
| Microsoft.NetCore.App.Runtime.win-arm64 | >= 10.0.0, <= 10.0.5 | 10.0.6 |
| Microsoft.NetCore.App.Runtime.win-x64 | >= 10.0.0, <= 10.0.5 | 10.0.6 |
| Microsoft.NetCore.App.Runtime.win-x86 | >= 10.0.0, <= 10.0.5 | 10.0.6 |
Advisory FAQ
How do I know if I am affected?
If using a package listed in affected packages, you're exposed to the vulnerability.
How do I fix the issue?
- To fix the issue please install the latest version of .NET 8.0, NET 9.0, or .NET 10.0, as appropriate. If you have installed one or more .NET SDKs through Visual Studio, Visual Studio will prompt you to update Visual Studio, which will also update your .NET SDKs.
- If your application references the vulnerable package, update the package reference to the patched version. You can list the versions you have installed by running the
dotnet --infocommand.
Once you have installed the updated runtime or SDK, restart your apps for the update to take effect.
Additionally, if you've deployed self-contained applications targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed.
Other Information
Reporting Security Issues
If you have found a potential security issue in a supported version of .NET, please report it to the Microsoft Security Response Center (MSRC) via the MSRC Researcher Portal. Further information can be found in the MSRC Report an Issue FAQ.
Security reports made through MSRC may qualify for the Microsoft .NET Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at https://aka.ms/corebounty.
Support
You can ask questions about this issue on GitHub in the .NET GitHub organization. The main repos are located at https://github.com/dotnet/runtime. The Announcements repo (https://github.com/dotnet/Announcements) will contain this bulletin as an issue and will include a link to a discussion issue. You can ask questions in the linked discussion issue.
Disclaimer
The information provided in this advisory is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
External Links
Acknowledgements
Ludvig Pedersen
Revisions
V1.0 (April 14, 2026): Advisory published.
Severity ?
0.0 (None)
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{
"database_specific": {
"last_known_affected_version_range": "\u003c= 9.0.14"
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"package": {
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"name": "Microsoft.NetCore.App.Runtime.win-arm64"
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"ranges": [
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"database_specific": {
"last_known_affected_version_range": "\u003c= 9.0.14"
},
"package": {
"ecosystem": "NuGet",
"name": "Microsoft.NetCore.App.Runtime.win-x64"
},
"ranges": [
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"introduced": "9.0.0"
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},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 9.0.14"
},
"package": {
"ecosystem": "NuGet",
"name": "Microsoft.NetCore.App.Runtime.win-x86"
},
"ranges": [
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],
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}
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},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 8.0.25"
},
"package": {
"ecosystem": "NuGet",
"name": "Microsoft.NetCore.App.Runtime.linux-arm"
},
"ranges": [
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"introduced": "8.0.0"
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{
"fixed": "8.0.26"
}
],
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}
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},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 8.0.25"
},
"package": {
"ecosystem": "NuGet",
"name": "Microsoft.NetCore.App.Runtime.linux-arm64"
},
"ranges": [
{
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{
"introduced": "8.0.0"
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{
"fixed": "8.0.26"
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}
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},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 8.0.25"
},
"package": {
"ecosystem": "NuGet",
"name": "Microsoft.NetCore.App.Runtime.linux-musl-arm"
},
"ranges": [
{
"events": [
{
"introduced": "8.0.0"
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{
"database_specific": {
"last_known_affected_version_range": "\u003c= 8.0.25"
},
"package": {
"ecosystem": "NuGet",
"name": "Microsoft.NetCore.App.Runtime.linux-musl-arm64"
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"ranges": [
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"last_known_affected_version_range": "\u003c= 8.0.25"
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"package": {
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{
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"last_known_affected_version_range": "\u003c= 8.0.25"
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"package": {
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},
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},
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"last_known_affected_version_range": "\u003c= 8.0.25"
},
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},
{
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"last_known_affected_version_range": "\u003c= 8.0.25"
},
"package": {
"ecosystem": "NuGet",
"name": "Microsoft.NetCore.App.Runtime.win-x64"
},
"ranges": [
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"introduced": "8.0.0"
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{
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},
"package": {
"ecosystem": "NuGet",
"name": "Microsoft.NetCore.App.Runtime.win-x86"
},
"ranges": [
{
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{
"introduced": "8.0.0"
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"fixed": "8.0.26"
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],
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}
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}
],
"aliases": [
"CVE-2026-32178"
],
"database_specific": {
"cwe_ids": [
"CWE-138"
],
"github_reviewed": true,
"github_reviewed_at": "2026-04-14T23:27:52Z",
"nvd_published_at": "2026-04-14T18:17:20Z",
"severity": "LOW"
},
"details": "## Executive Summary: \n\nMicrosoft is releasing this security advisory to provide information about a vulnerability in .NET 8.0, .NET 9.0, and .NET 10.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.\n\nA vulnerability exists in System.Net.Mail where specially crafted data allows an unauthorized attacker to perform a spoofing attack over the network.\n\n## Announcement\n\nAnnouncement for this issue can be found at https://github.com/dotnet/announcements/issues/12345\n\n## CVSS Details\n\n- **Version:** 3.1\n- **Severity:** High\n- **Score:** 7.5\n- **Vector:** 7.5: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C\n- **Weakness:** CWE-138: Improper Neutralization of Special Elements\n\n## Affected Platforms\n\n- **Platforms:** All\n- **Architectures:** All\n\n## \u003ca name=\"affected-packages\"\u003e\u003c/a\u003eAffected Packages\nThe vulnerability affects any Microsoft .NET project if it uses any of affected package versions listed below\n\n\n### \u003ca name=\".NET 8\"\u003e\u003c/a\u003e.NET 8\nPackage name | Affected version | Patched version\n------------ | ---------------- | -------------------------\n[Microsoft.NetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm) | \u003e= 8.0.0, \u003c= 8.0.25 | 8.0.26\n[Microsoft.NetCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm64) | \u003e= 8.0.0, \u003c= 8.0.25 | 8.0.26\n[Microsoft.NetCore.App.Runtime.linux-musl-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm) | \u003e= 8.0.0, \u003c= 8.0.25 | 8.0.26\n[Microsoft.NetCore.App.Runtime.linux-musl-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm64) | \u003e= 8.0.0, \u003c= 8.0.25 | 8.0.26\n[Microsoft.NetCore.App.Runtime.linux-musl-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-x64) | \u003e= 8.0.0, \u003c= 8.0.25 | 8.0.26\n[Microsoft.NetCore.App.Runtime.linux-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-x64) | \u003e= 8.0.0, \u003c= 8.0.25 | 8.0.26\n[Microsoft.NetCore.App.Runtime.osx-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-arm64) | \u003e= 8.0.0, \u003c= 8.0.25 | 8.0.26\n[Microsoft.NetCore.App.Runtime.osx-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-x64) | \u003e= 8.0.0, \u003c= 8.0.25 | 8.0.26\n[Microsoft.NetCore.App.Runtime.win-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm) | \u003e= 8.0.0, \u003c= 8.0.25 | 8.0.26\n[Microsoft.NetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm64) | \u003e= 8.0.0, \u003c= 8.0.25 | 8.0.26\n[Microsoft.NetCore.App.Runtime.win-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x64) | \u003e= 8.0.0, \u003c= 8.0.25 | 8.0.26\n[Microsoft.NetCore.App.Runtime.win-x86](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x86) | \u003e= 8.0.0, \u003c= 8.0.25 | 8.0.26\n\n\n### \u003ca name=\".NET 9\"\u003e\u003c/a\u003e.NET 9\nPackage name | Affected version | Patched version\n------------ | ---------------- | -------------------------\n[Microsoft.NetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm) | \u003e= 9.0.0, \u003c= 9.0.14 | 9.0.15\n[Microsoft.NetCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm64) | \u003e= 9.0.0, \u003c= 9.0.14 | 9.0.15\n[Microsoft.NetCore.App.Runtime.linux-musl-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm) | \u003e= 9.0.0, \u003c= 9.0.14 | 9.0.15\n[Microsoft.NetCore.App.Runtime.linux-musl-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm64) | \u003e= 9.0.0, \u003c= 9.0.14 | 9.0.15\n[Microsoft.NetCore.App.Runtime.linux-musl-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-x64) | \u003e= 9.0.0, \u003c= 9.0.14 | 9.0.15\n[Microsoft.NetCore.App.Runtime.linux-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-x64) | \u003e= 9.0.0, \u003c= 9.0.14 | 9.0.15\n[Microsoft.NetCore.App.Runtime.osx-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-arm64) | \u003e= 9.0.0, \u003c= 9.0.14 | 9.0.15\n[Microsoft.NetCore.App.Runtime.osx-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-x64) | \u003e= 9.0.0, \u003c= 9.0.14 | 9.0.15\n[Microsoft.NetCore.App.Runtime.win-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm) | \u003e= 9.0.0, \u003c= 9.0.14 | 9.0.15\n[Microsoft.NetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm64) | \u003e= 9.0.0, \u003c= 9.0.14 | 9.0.15\n[Microsoft.NetCore.App.Runtime.win-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x64) | \u003e= 9.0.0, \u003c= 9.0.14 | 9.0.15\n[Microsoft.NetCore.App.Runtime.win-x86](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x86) | \u003e= 9.0.0, \u003c= 9.0.14 | 9.0.15\n\n### \u003ca name=\".NET 10\"\u003e\u003c/a\u003e.NET 10\nPackage name | Affected version | Patched version\n------------ | ---------------- | -------------------------\n[Microsoft.NetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm) | \u003e= 10.0.0, \u003c= 10.0.5 | 10.0.6\n[Microsoft.NetCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm64) | \u003e= 10.0.0, \u003c= 10.0.5 | 10.0.6\n[Microsoft.NetCore.App.Runtime.linux-musl-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm) | \u003e= 10.0.0, \u003c= 10.0.5 | 10.0.6\n[Microsoft.NetCore.App.Runtime.linux-musl-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm64) | \u003e= 10.0.0, \u003c= 10.0.5 | 10.0.6\n[Microsoft.NetCore.App.Runtime.linux-musl-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-x64) | \u003e= 10.0.0, \u003c= 10.0.5 | 10.0.6\n[Microsoft.NetCore.App.Runtime.linux-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-x64) | \u003e= 10.0.0, \u003c= 10.0.5 | 10.0.6\n[Microsoft.NetCore.App.Runtime.osx-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-arm64) | \u003e= 10.0.0, \u003c= 10.0.5 | 10.0.6\n[Microsoft.NetCore.App.Runtime.osx-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-x64) | \u003e= 10.0.0, \u003c= 10.0.5 | 10.0.6\n[Microsoft.NetCore.App.Runtime.win-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm) | \u003e= 10.0.0, \u003c= 10.0.5 | 10.0.6\n[Microsoft.NetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm64) | \u003e= 10.0.0, \u003c= 10.0.5 | 10.0.6\n[Microsoft.NetCore.App.Runtime.win-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x64) | \u003e= 10.0.0, \u003c= 10.0.5 | 10.0.6\n[Microsoft.NetCore.App.Runtime.win-x86](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x86) | \u003e= 10.0.0, \u003c= 10.0.5 | 10.0.6\n\n## Advisory FAQ\n\n### \u003ca name=\"how-affected\"\u003e\u003c/a\u003eHow do I know if I am affected?\n\nIf using a package listed in [affected packages](#affected-packages), you\u0027re exposed to the vulnerability.\n\n### \u003ca name=\"how-fix\"\u003e\u003c/a\u003eHow do I fix the issue?\n\n1. To fix the issue please install the latest version of .NET 8.0, NET 9.0, or .NET 10.0, as appropriate. If you have installed one or more .NET SDKs through Visual Studio, Visual Studio will prompt you to update Visual Studio, which will also update your .NET SDKs.\n2. If your application references the vulnerable package, update the package reference to the patched version. You can list the versions you have installed by running the `dotnet --info` command.\n\nOnce you have installed the updated runtime or SDK, restart your apps for the update to take effect.\n\nAdditionally, if you\u0027ve deployed [self-contained applications](https://docs.microsoft.com/dotnet/core/deploying/#self-contained-deployments-scd) targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed.\n\n## Other Information\n\n### Reporting Security Issues\n\nIf you have found a potential security issue in a supported version of .NET, please report it to the Microsoft Security Response Center (MSRC) via the [MSRC Researcher Portal](https://msrc.microsoft.com/report/vulnerability/new). Further information can be found in the MSRC [Report an Issue FAQ](https://www.microsoft.com/msrc/faqs-report-an-issue).\n\nSecurity reports made through MSRC may qualify for the Microsoft .NET Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at https://aka.ms/corebounty.\n\n### Support\n\nYou can ask questions about this issue on GitHub in the .NET GitHub organization. The main repos are located at https://github.com/dotnet/runtime. The Announcements repo (https://github.com/dotnet/Announcements) will contain this bulletin as an issue and will include a link to a discussion issue. You can ask questions in the linked discussion issue.\n\n### Disclaimer\n\nThe information provided in this advisory is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.\n\n### External Links\n\n[CVE-2026-32178]( https://www.cve.org/CVERecord?id=CVE-2026-32178)\n\n### Acknowledgements\n\nLudvig Pedersen\n\n### Revisions\n\nV1.0 (April 14, 2026): Advisory published.",
"id": "GHSA-vmwf-m9c5-3jvc",
"modified": "2026-04-14T23:27:52Z",
"published": "2026-04-14T23:27:52Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/dotnet/runtime/security/advisories/GHSA-vmwf-m9c5-3jvc"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32178"
},
{
"type": "WEB",
"url": "https://github.com/dotnet/announcements/issues/12345"
},
{
"type": "PACKAGE",
"url": "https://github.com/dotnet/runtime"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32178"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N",
"type": "CVSS_V3"
}
],
"summary": "Microsoft Security Advisory CVE-2026-32178 \u2013 .NET Spoofing Vulnerability "
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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