Common Weakness Enumeration

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.

Relationships and members
ChildOf: CWE-266 · View CWE-1000
Modes of introduction
Architecture and Design
Implementation
Operation
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
Submission: Anonymous Tool Vendor (under NDA) · 2006-07-19 · CWE Draft 3
Modification: Eric Dalci · Cigital · 2008-07-01 · CWE 1.0

updated Potential_Mitigations, Time_of_Introduction

Modification: CWE Content Team · MITRE · 2008-09-08 · CWE 1.0

updated Relationships, Other_Notes, Taxonomy_Mappings

Modification: CWE Content Team · MITRE · 2011-06-01 · CWE 1.13

updated Common_Consequences

Modification: CWE Content Team · MITRE · 2012-05-11 · CWE 2.2

updated Relationships

Modification: CWE Content Team · MITRE · 2012-10-30 · CWE 2.3

updated Potential_Mitigations

Modification: CWE Content Team · MITRE · 2014-06-23 · CWE 2.7

updated Description, Other_Notes

Modification: CWE Content Team · MITRE · 2017-11-08 · CWE 3.0

updated Taxonomy_Mappings

Modification: CWE Content Team · MITRE · 2020-02-24 · CWE 4.0

updated Relationships

Modification: CWE Content Team · MITRE · 2021-10-28 · CWE 4.6

updated Relationships

Modification: CWE Content Team · MITRE · 2023-04-27 · CWE 4.11

updated Relationships

Modification: CWE Content Team · MITRE · 2023-06-29 · CWE 4.12

updated Mapping_Notes

Modification: CWE Content Team · MITRE · 2025-12-11 · CWE 4.19

updated Applicable_Platforms, Weakness_Ordinalities

Modification: CWE Content Team · MITRE · 2026-10-28 · CWE 5.0

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
VLAI
Title
Langflow is affected by remote code execution, denial of service, path traversal, and exposed credentials due to multiple unauthenticated and insufficiently authorized API endpoints
Summary
IBM 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.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-30 19:21 UTC
CWE
  • CWE-520 - .NET Misconfiguration: Use of Impersonation
Assigner
ibm CNA under the mitre root
CNA scorecard B 88/100 over 1337 records in the last 180 days details
References
URL Tags
https://www.ibm.com/support/pages/node/7279989 vendor-advisorypatch
Impacted products
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:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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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
VLAI
Title
Langflow is affected by NET Misconfiguration: Use of Impersonation due to multiple unauthenticated and insufficiently authorized API endpoints
Summary
IBM 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.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-29 14:11 UTC
CWE
  • CWE-520 - .NET Misconfiguration: Use of Impersonation
Assigner
ibm CNA under the mitre root
CNA scorecard B 88/100 over 1337 records in the last 180 days details
References
URL Tags
https://www.ibm.com/support/pages/node/7279988 vendor-advisorypatch
Impacted products
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:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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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
VLAI
Summary
.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.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-14 13:01 UTC
CWE
  • CWE-520 - .NET misconfiguration: use of impersonation
Assigner
upKeeper CNA under the mitre root
CNA scorecard – unranked: 2 records in the last 180 days, 10 needed details
Impacted products
Show details on NVD website

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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
VLAI
Title
Iperius Backup 6.1.0 Privilege Escalation via Backup Job
Summary
Iperius 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.
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-23 15:30 UTC
CWE
  • CWE-520 - .NET Misconfiguration: Use of Impersonation
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 7427 records in the last 180 days details
Impacted products
Vendor Product Version
Iperius Iperius Backup Affected: 6.1.0
    cpe:2.3:a:entersrl:iperius_backup:6.1.0:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2019-05-17 00:00
Credits
Show details on NVD website

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            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-520",
              "description": ".NET Misconfiguration: Use of Impersonation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-01T15:19:20.314Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "ExploitDB-46863",
          "tags": [
            "exploit"
          ],
          "url": "https://www.exploit-db.com/exploits/46863"
        },
        {
          "name": "Official Product Homepage",
          "tags": [
            "product"
          ],
          "url": "https://www.iperiusbackup.com/"
        },
        {
          "name": "Product Reference",
          "tags": [
            "product"
          ],
          "url": "https://www.iperiusbackup.com/download.aspx"
        },
        {
          "name": "VulnCheck Advisory: Iperius Backup 6.1.0 Privilege Escalation via Backup Job",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/iperius-backup-privilege-escalation-via-backup-job"
        }
      ],
      "title": "Iperius Backup 6.1.0 Privilege Escalation via Backup Job",
      "x_generator": {
        "engine": "vulncheck"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2019-25608",
    "datePublished": "2026-03-22T13:38:42.514Z",
    "dateReserved": "2026-03-22T13:14:56.383Z",
    "dateUpdated": "2026-10-01T15:19:20.314Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

GHSA-25HQ-FGWV-MQ8P

Vulnerability from github – Published: 2026-03-22 15:31 – Updated: 2026-03-22 15:31
VLAI
Details

Iperius 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.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2019-25608"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-520"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-22T14:16:28Z",
    "severity": "HIGH"
  },
  "details": "Iperius 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.",
  "id": "GHSA-25hq-fgwv-mq8p",
  "modified": "2026-03-22T15:31:28Z",
  "published": "2026-03-22T15:31:28Z",
  "references": [
    {
      "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 20:16
VLAI
Summary
OpenDaylight Authentication, Authorization and Accounting (AAA) peer impersonation vulnerability
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.

Show details on source website

{
  "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 21:31
VLAI
Details

IBM 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.

Show details on source website

{
  "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 21:31
VLAI
Details

IBM 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.

Show details on source website

{
  "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
VLAI
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.

Show details on source website

{
  "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
Operation

Run the application with limited privilege to the underlying operating and file system.

No CAPEC attack patterns related to this CWE.