Vulnerability-Lookup

GHSA-MQVM-GMC4-6RV2

Vulnerability from github – Published: 2026-09-08 18:32 – Updated: 2026-09-09 16:02

Withdrawn 2026-09-09

Summary

Duplicate Advisory: Microsoft Security Advisory CVE-2026-69439 – .NET and Visual Studio Elevation of Privilege Vulnerability

Details

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-527h-q9f6-p7qx. This link is maintained to preserve external references.

Original Description

Heap-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.

Severity

8.8 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 18.9.0-beta1.26405.1"
      },
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.DiaSymReader.Native"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.10.0-beta1.24272.1"
            },
            {
              "fixed": "18.9.0-beta1.26405.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-122"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-09T16:02:52Z",
    "nvd_published_at": "2026-09-08T18:19:07Z",
    "severity": "HIGH"
  },
  "details": "### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-527h-q9f6-p7qx. This link is maintained to preserve external references.\n\n### Original Description\nHeap-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.",
  "id": "GHSA-mqvm-gmc4-6rv2",
  "modified": "2026-09-09T16:02:52Z",
  "published": "2026-09-08T18:32:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-69439"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/dotnet/runtime"
    },
    {
      "type": "WEB",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69439"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Duplicate Advisory: Microsoft Security Advisory CVE-2026-69439 \u2013 .NET and Visual Studio Elevation of Privilege Vulnerability",
  "withdrawn": "2026-09-09T16:02:52Z"
}

CVE-2026-69439 (GCVE-0-2026-69439)

Vulnerability from cvelistv5 – Published: 2026-09-08 17:17 – Updated: 2026-10-14 23:13

Title

.NET and Visual Studio Elevation of Privilege Vulnerability

Summary

Heap-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-09 04:18 UTC

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

microsoft CNA under the mitre root

CNA scorecard B 82/100 over 3954 records in the last 180 days details

References

1 reference

URL	Tags
https://msrc.microsoft.com/update-guide/vulnerabi…	vendor-advisorypatch

Impacted products

6 products

Vendor	Product	Version
Microsoft	.NET 10.0	Affected: 10.0.0 , < 10.0.12 (custom)
Microsoft	.NET 11.0	Affected: 11.0.0 , < 11.0 RC1 (custom)
Microsoft	.NET 8.0	Affected: 8.0.0 , < 8.0.31 (custom)
Microsoft	.NET 9.0	Affected: 9.0.0 , < 9.0.20 (custom)
Microsoft	Microsoft Visual Studio 2022 version 17.14	Affected: 17.14.0 , < 17.14.40 (custom)
Microsoft	Microsoft Visual Studio 2026 version 18.9	Affected: 18.9.0 , < 18.9.3 (custom)

Date Public

2026-09-08 14:00

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-69439",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-09T04:18:13.070091Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-09T09:54:54.597Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "product": ".NET 10.0",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.12",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": ".NET 11.0",
          "vendor": "Microsoft",
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            {
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              "status": "affected",
              "version": "11.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": ".NET 8.0",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "8.0.31",
              "status": "affected",
              "version": "8.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": ".NET 9.0",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "9.0.20",
              "status": "affected",
              "version": "9.0.0",
              "versionType": "custom"
            }
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        },
        {
          "product": "Microsoft Visual Studio 2022 version 17.14",
          "vendor": "Microsoft",
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              "lessThan": "17.14.40",
              "status": "affected",
              "version": "17.14.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Microsoft Visual Studio 2026 version 18.9",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "18.9.3",
              "status": "affected",
              "version": "18.9.0",
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      ],
      "cpeApplicability": [
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              "cpeMatch": [
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                },
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      "descriptions": [
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          "lang": "en-US",
          "value": "Heap-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
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      "providerMetadata": {
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      "references": [
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          "tags": [
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        }
      ],
      "title": ".NET and Visual Studio Elevation of Privilege Vulnerability"
    }
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    "datePublished": "2026-09-08T17:17:35.650Z",
    "dateReserved": "2026-08-03T20:59:32.784Z",
    "dateUpdated": "2026-10-14T23:13:02.100Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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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