MSRC_CVE-2026-47300
Vulnerability from csaf_microsoft - Published: 2026-07-14 07:00 - Updated: 2026-07-14 07:00Summary
ASP.NET Core Elevation of Privilege 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-303
- Incorrect Implementation of Authentication Algorithm
Affected products
Fixed
11 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
.NET 8.0 installed on Windows 8.0.29
.NET 8.0 installed on Windows
|
8.0.29 | ||
|
.NET 8.0 installed on Linux 8.0.29
.NET 8.0 installed on Linux
|
8.0.29 | ||
|
.NET 8.0 installed on Mac OS 8.0.29
.NET 8.0 installed on Mac OS
|
8.0.29 | ||
|
.NET 9.0 installed on Linux 9.0.18
.NET 9.0 installed on Linux
|
9.0.18 | ||
|
.NET 9.0 installed on Mac OS 9.0.18
.NET 9.0 installed on Mac OS
|
9.0.18 | ||
|
.NET 9.0 installed on Windows 9.0.18
.NET 9.0 installed on Windows
|
9.0.18 | ||
|
Microsoft Visual Studio 2022 version 17.12 17.12.22
Microsoft Visual Studio 2022 version 17.12
|
17.12.22 | ||
|
Microsoft Visual Studio 2022 version 17.14 17.14.36
Microsoft Visual Studio 2022 version 17.14
|
17.14.36 | ||
|
.NET 10.0 installed on Mac OS 10.0.6
.NET 10.0 installed on Mac OS
|
10.0.6 | ||
|
.NET 10.0 installed on Linux 10.0.6
.NET 10.0 installed on Linux
|
10.0.6 | ||
|
Microsoft Visual Studio 2026 version 18.7 18.7.4
Microsoft Visual Studio 2026 version 18.7
|
18.7.4 |
Known affected
11 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Microsoft Visual Studio 2026 version 18.7 <18.7.4
Microsoft Visual Studio 2026 version 18.7
|
<18.7.4 |
Vendor Fix
fix
|
|
|
.NET 10.0 installed on Linux <10.0.6
.NET 10.0 installed on Linux
|
<10.0.6 |
Vendor Fix
fix
|
|
|
.NET 10.0 installed on Mac OS <10.0.6
.NET 10.0 installed on Mac OS
|
<10.0.6 |
Vendor Fix
fix
|
|
|
Microsoft Visual Studio 2022 version 17.14 <17.14.36
Microsoft Visual Studio 2022 version 17.14
|
<17.14.36 |
Vendor Fix
fix
|
|
|
Microsoft Visual Studio 2022 version 17.12 <17.12.22
Microsoft Visual Studio 2022 version 17.12
|
<17.12.22 |
Vendor Fix
fix
|
|
|
.NET 9.0 installed on Windows <9.0.18
.NET 9.0 installed on Windows
|
<9.0.18 |
Vendor Fix
fix
|
|
|
.NET 9.0 installed on Mac OS <9.0.18
.NET 9.0 installed on Mac OS
|
<9.0.18 |
Vendor Fix
fix
|
|
|
.NET 9.0 installed on Linux <9.0.18
.NET 9.0 installed on Linux
|
<9.0.18 |
Vendor Fix
fix
|
|
|
.NET 8.0 installed on Mac OS <8.0.29
.NET 8.0 installed on Mac OS
|
<8.0.29 |
Vendor Fix
fix
|
|
|
.NET 8.0 installed on Linux <8.0.29
.NET 8.0 installed on Linux
|
<8.0.29 |
Vendor Fix
fix
|
|
|
.NET 8.0 installed on Windows <8.0.29
.NET 8.0 installed on Windows
|
<8.0.29 |
Vendor Fix
fix
|
Threats
Impact
Elevation of Privilege
Exploit Status
Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely
References
7 references
Acknowledgments
Artur Stetsko
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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.",
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{
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"url": "https://support.microsoft.com/lifecycle"
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{
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"url": "https://www.first.org/cvss"
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"status": "final",
"version": "1"
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},
"product_tree": {
"branches": [
{
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"category": "product_name",
"name": ".NET 10.0 installed on Mac OS"
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{
"branches": [
{
"category": "product_version_range",
"name": "\u003c8.0.29",
"product": {
"name": ".NET 8.0 installed on Windows \u003c8.0.29",
"product_id": "11"
}
},
{
"category": "product_version",
"name": "8.0.29",
"product": {
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"product_id": "12414"
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"category": "product_name",
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"category": "product_name",
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"branches": [
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},
{
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"category": "product_name",
"name": ".NET 9.0 installed on Linux"
},
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"branches": [
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},
{
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"product": {
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"category": "product_name",
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"vulnerabilities": [
{
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"cwe": {
"id": "CWE-303",
"name": "Incorrect Implementation of Authentication Algorithm"
},
"notes": [
{
"category": "general",
"text": "Microsoft",
"title": "Assigning CNA"
},
{
"category": "faq",
"text": "An attacker who successfully exploited this vulnerability could gain administrator privileges.",
"title": "What privileges could be gained by an attacker who successfully exploited the vulnerability?"
},
{
"category": "faq",
"text": "An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.",
"title": "What privileges could be gained by an attacker who successfully exploited this vulnerability?"
}
],
"product_status": {
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"2",
"3",
"4",
"5",
"6",
"7",
"8",
"9",
"10",
"11"
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{
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"product_ids": [
"1"
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}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"environmentalScore": 0.0,
"exploitCodeMaturity": "UNPROVEN",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"remediationLevel": "OFFICIAL_FIX",
"reportConfidence": "CONFIRMED",
"scope": "UNCHANGED",
"temporalScore": 7.7,
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
"version": "3.1"
},
"products": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8",
"9",
"10",
"11"
]
}
],
"threats": [
{
"category": "impact",
"details": "Elevation of Privilege"
},
{
"category": "exploit_status",
"details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely"
}
],
"title": "ASP.NET Core Elevation of Privilege Vulnerability"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
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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