CWE-520
Weakness Allowed.NET Misconfiguration: Use of Impersonation
Abstraction: Variant · Status: Incomplete
Allowing a .NET application to run at potentially escalated levels of access to the underlying operating and file systems can be dangerous and result in various forms of attacks.
Mapping guidance
This CWE entry is at the Variant level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.
Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.
Modes of introduction
Detection methods
Automated Static Analysis
Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.)
Content history
updated Potential_Mitigations, Time_of_Introduction
updated Relationships, Other_Notes, Taxonomy_Mappings
updated Common_Consequences
updated Relationships
updated Potential_Mitigations
updated Description, Other_Notes
updated Taxonomy_Mappings
updated Relationships
updated Relationships
updated Relationships
updated Mapping_Notes
updated Applicable_Platforms, Weakness_Ordinalities
updated Background_Details, Description, Detection_Factors
9 vulnerabilities reference this CWE, most recent first.
CVE-2026-13444 (GCVE-0-2026-13444)
Vulnerability from cvelistv5 – Published: 2026-07-30 18:38 – Updated: 2026-07-30 19:21- CWE-520 - .NET Misconfiguration: Use of Impersonation
| URL | Tags |
|---|---|
| https://www.ibm.com/support/pages/node/7279989 | vendor-advisorypatch |
| Vendor | Product | Version | |
|---|---|---|---|
| IBM | Langflow OSS |
Affected:
1.0.0 , ≤ 1.10.1
(semver)
cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:* cpe:2.3:a:ibm:langflow_oss:1.10.1:*:*:*:*:*:*:* |
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CVE-2026-13442 (GCVE-0-2026-13442)
Vulnerability from cvelistv5 – Published: 2026-07-28 20:55 – Updated: 2026-07-29 14:11- CWE-520 - .NET Misconfiguration: Use of Impersonation
| URL | Tags |
|---|---|
| https://www.ibm.com/support/pages/node/7279988 | vendor-advisorypatch |
| Vendor | Product | Version | |
|---|---|---|---|
| IBM | Langflow OSS |
Affected:
1.0.0 , ≤ 1.10.1
(semver)
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CVE-2026-2450 (GCVE-0-2026-2450)
Vulnerability from cvelistv5 – Published: 2026-04-14 12:07 – Updated: 2026-04-14 13:14- CWE-520 - .NET misconfiguration: use of impersonation
| Vendor | Product | Version | |
|---|---|---|---|
| upKeeper Solutions | upKeeper Instant Privilege Access |
Affected:
0 , ≤ 1.5.0
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CVE-2019-25608 (GCVE-0-2019-25608)
Vulnerability from cvelistv5 – Published: 2026-03-22 13:38 – Updated: 2026-10-01 15:19- CWE-520 - .NET Misconfiguration: Use of Impersonation
| URL | Tags |
|---|---|
| https://www.exploit-db.com/exploits/46863 | exploit |
| https://www.iperiusbackup.com/ | product |
| https://www.iperiusbackup.com/download.aspx | product |
| https://www.vulncheck.com/advisories/iperius-back… | third-party-advisory |
| Vendor | Product | Version | |
|---|---|---|---|
| Iperius | Iperius Backup |
Affected:
6.1.0
cpe:2.3:a:entersrl:iperius_backup:6.1.0:*:*:*:*:*:*:* |
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GHSA-25HQ-FGWV-MQ8P
Vulnerability from github – Published: 2026-03-22 15:31 – Updated: 2026-03-22 15:31Iperius Backup 6.1.0 contains a privilege escalation vulnerability that allows low-privilege users to execute arbitrary programs with elevated privileges by creating backup jobs. Attackers can configure backup jobs to execute malicious batch files or programs before or after backup operations, which run with the privileges of the Iperius Backup Service account (Local System or Administrator), enabling privilege escalation and arbitrary code execution.
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{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-25608"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/exploits/46863"
},
{
"type": "WEB",
"url": "https://www.iperiusbackup.com"
},
{
"type": "WEB",
"url": "https://www.iperiusbackup.com/download.aspx"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/iperius-backup-privilege-escalation-via-backup-job"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-46HR-3CQ3-MCGP
Vulnerability from github – Published: 2024-09-16 14:37 – Updated: 2024-09-16 20:16An issue was discovered in OpenDaylight Authentication, Authorization and Accounting (AAA) through 0.19.3. A rogue controller can join a cluster to impersonate an offline peer, even if this rogue controller does not possess the complete cluster configuration information.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.opendaylight.aaa:aaa-artifacts"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "0.19.3"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-46943"
],
"database_specific": {
"cwe_ids": [
"CWE-285",
"CWE-287",
"CWE-520"
],
"github_reviewed": true,
"github_reviewed_at": "2024-09-16T20:16:16Z",
"nvd_published_at": "2024-09-15T23:15:11Z",
"severity": "MODERATE"
},
"details": "An issue was discovered in OpenDaylight Authentication, Authorization and Accounting (AAA) through 0.19.3. A rogue controller can join a cluster to impersonate an offline peer, even if this rogue controller does not possess the complete cluster configuration information.",
"id": "GHSA-46hr-3cq3-mcgp",
"modified": "2024-09-16T20:16:16Z",
"published": "2024-09-16T14:37:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-46943"
},
{
"type": "WEB",
"url": "https://docs.opendaylight.org/en/latest/release-notes/projects/aaa.html"
},
{
"type": "WEB",
"url": "https://doi.org/10.48550/arXiv.2408.16940"
},
{
"type": "PACKAGE",
"url": "https://github.com/opendaylight/aaa"
},
{
"type": "WEB",
"url": "https://lf-opendaylight.atlassian.net/browse/AAA-285"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "OpenDaylight Authentication, Authorization and Accounting (AAA) peer impersonation vulnerability"
}
GHSA-668J-2F6W-GQWR
Vulnerability from github – Published: 2026-07-28 21:31 – Updated: 2026-07-28 21:31IBM Langflow OSS 1.0.0 through 1.10.1 can allow an attacker to reuse another user's FAISS namespace to access owner-only vector content and influence later query results. This causes cross-user information disclosure and limited integrity impact through persistent poisoning of returned results.
{
"affected": [],
"aliases": [
"CVE-2026-13442"
],
"database_specific": {
"cwe_ids": [
"CWE-520"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-28T21:17:25Z",
"severity": "HIGH"
},
"details": "IBM Langflow OSS 1.0.0 through 1.10.1 can allow an attacker to reuse another user\u0027s FAISS namespace to access owner-only vector content and influence later query results. This causes cross-user information disclosure and limited integrity impact through persistent poisoning of returned results.",
"id": "GHSA-668j-2f6w-gqwr",
"modified": "2026-07-28T21:31:34Z",
"published": "2026-07-28T21:31:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13442"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/7279988"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-VRQM-44RP-59J5
Vulnerability from github – Published: 2026-07-30 21:31 – Updated: 2026-07-30 21:31IBM Langflow OSS 1.0.0 through 1.10.1 can allow an attacker to access another user's private vector documents by creating their own flow with matching Chroma persist_directory and collection_name values. The attacker receives exact victim content in their workflow output despite having no authorization to read the victim's flow. Additionally, the attacker can pollute the victim's collection by inserting their own documents into the shared namespace.
{
"affected": [],
"aliases": [
"CVE-2026-13444"
],
"database_specific": {
"cwe_ids": [
"CWE-520"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-30T19:17:06Z",
"severity": "HIGH"
},
"details": "IBM Langflow OSS 1.0.0 through 1.10.1 can allow an attacker to access another user\u0027s private vector documents by creating their own flow with matching Chroma persist_directory and collection_name values. The attacker receives exact victim content in their workflow output despite having no authorization to read the victim\u0027s flow. Additionally, the attacker can pollute the victim\u0027s collection by inserting their own documents into the shared namespace.",
"id": "GHSA-vrqm-44rp-59j5",
"modified": "2026-07-30T21:31:48Z",
"published": "2026-07-30T21:31:48Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13444"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/7279989"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-XGQ8-F73Q-Q3GM
Vulnerability from github – Published: 2026-04-14 15:30 – Updated: 2026-04-14 15:30.NET misconfiguration: use of impersonation vulnerability in upKeeper Solutions upKeeper Instant Privilege Access allows Hijacking a Privileged Thread of Execution.This issue affects upKeeper Instant Privilege Access: through 1.5.0.
{
"affected": [],
"aliases": [
"CVE-2026-2450"
],
"database_specific": {
"cwe_ids": [
"CWE-520"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-04-14T13:16:22Z",
"severity": "HIGH"
},
"details": ".NET misconfiguration: use of impersonation vulnerability in upKeeper Solutions upKeeper Instant Privilege Access allows Hijacking a Privileged Thread of Execution.This issue affects upKeeper Instant Privilege Access: through 1.5.0.",
"id": "GHSA-xgq8-f73q-q3gm",
"modified": "2026-04-14T15:30:34Z",
"published": "2026-04-14T15:30:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-2450"
},
{
"type": "WEB",
"url": "https://support.upkeeper.se/hc/en-us/articles/26783542353692-CVE-2026-2450-NET-misconfiguration-use-of-impersonation"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
Mitigation
Run the application with limited privilege to the underlying operating and file system.
No CAPEC attack patterns related to this CWE.