Vulnerability-Lookup

MSRC_CVE-2026-69809

Vulnerability from csaf_microsoft - Published: 2026-09-08 07:00 - Updated: 2026-09-08 07:00

Summary

Windows Active Directory Domain Services Denial of Service Vulnerability

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.

CVE-2026-69809

7.5 (High)


                
                  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

CWE-401 - Missing Release of Memory after Effective Lifetime

Affected products

Fixed 12 products

Product	Identifier	Version	Remediation
Windows Server 2022 10.0.20348.5622 Microsoft / Windows Server 2022		10.0.20348.5622
Windows Server 2022 (Server Core installation) 10.0.20348.5622 Microsoft / Windows Server 2022 (Server Core installation)		10.0.20348.5622
Windows Server 2025 (Server Core installation) 10.0.26100.33438 Microsoft / Windows Server 2025 (Server Core installation)		10.0.26100.33438
Windows 11 Version 25H2 for ARM64-based Systems 10.0.26200.9445 Microsoft / Windows 11 Version 25H2 for ARM64-based Systems		10.0.26200.9445
Windows 11 Version 25H2 for x64-based Systems 10.0.26200.9445 Microsoft / Windows 11 Version 25H2 for x64-based Systems		10.0.26200.9445
Windows 11 Version 23H2 for ARM64-based Systems 10.0.22631.7582 Microsoft / Windows 11 Version 23H2 for ARM64-based Systems		10.0.22631.7582
Windows 11 Version 23H2 for x64-based Systems 10.0.22631.7582 Microsoft / Windows 11 Version 23H2 for x64-based Systems		10.0.22631.7582
Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.9445 Microsoft / Windows 11 Version 24H2 for ARM64-based Systems		10.0.26100.9445
Windows 11 Version 24H2 for x64-based Systems 10.0.26100.9445 Microsoft / Windows 11 Version 24H2 for x64-based Systems		10.0.26100.9445
Windows Server 2025 10.0.26100.33438 Microsoft / Windows Server 2025		10.0.26100.33438
Windows 11 version 26H1 for x64-based Systems 10.0.28000.2954 Microsoft / Windows 11 version 26H1 for x64-based Systems		10.0.28000.2954
Windows 11 Version 26H1 for ARM64-based Systems 10.0.28000.2954 Microsoft / Windows 11 Version 26H1 for ARM64-based Systems		10.0.28000.2954

Known affected 12 products

Product	Version	Remediation
Windows Server 2022 <10.0.20348.5622 Microsoft / Windows Server 2022	<10.0.20348.5622	Vendor Fix fix
Windows Server 2022 (Server Core installation) <10.0.20348.5622 Microsoft / Windows Server 2022 (Server Core installation)	<10.0.20348.5622	Vendor Fix fix
Windows Server 2025 (Server Core installation) <10.0.26100.33438 Microsoft / Windows Server 2025 (Server Core installation)	<10.0.26100.33438	Vendor Fix fix
Windows 11 Version 25H2 for ARM64-based Systems <10.0.26200.9445 Microsoft / Windows 11 Version 25H2 for ARM64-based Systems	<10.0.26200.9445	Vendor Fix fix
Windows 11 Version 25H2 for x64-based Systems <10.0.26200.9445 Microsoft / Windows 11 Version 25H2 for x64-based Systems	<10.0.26200.9445	Vendor Fix fix
Windows 11 Version 23H2 for ARM64-based Systems <10.0.22631.7582 Microsoft / Windows 11 Version 23H2 for ARM64-based Systems	<10.0.22631.7582	Vendor Fix fix
Windows 11 Version 23H2 for x64-based Systems <10.0.22631.7582 Microsoft / Windows 11 Version 23H2 for x64-based Systems	<10.0.22631.7582	Vendor Fix fix
Windows 11 Version 24H2 for ARM64-based Systems <10.0.26100.9445 Microsoft / Windows 11 Version 24H2 for ARM64-based Systems	<10.0.26100.9445	Vendor Fix fix
Windows 11 Version 24H2 for x64-based Systems <10.0.26100.9445 Microsoft / Windows 11 Version 24H2 for x64-based Systems	<10.0.26100.9445	Vendor Fix fix
Windows Server 2025 <10.0.26100.33438 Microsoft / Windows Server 2025	<10.0.26100.33438	Vendor Fix fix
Windows 11 version 26H1 for x64-based Systems <10.0.28000.2954 Microsoft / Windows 11 version 26H1 for x64-based Systems	<10.0.28000.2954	Vendor Fix fix
Windows 11 Version 26H1 for ARM64-based Systems <10.0.28000.2954 Microsoft / Windows 11 Version 26H1 for ARM64-based Systems	<10.0.28000.2954	Vendor Fix fix

References

4 references

URL	Category
https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self
https://support.microsoft.com/lifecycle	external
https://www.first.org/cvss	external
https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self

JSON

To clipboard

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    "category": "csaf_vex",
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      "tlp": {
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        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "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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    "title": "Windows Active Directory Domain Services Denial of Service Vulnerability",
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      },
      "notes": [
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          "5",
          "4",
          "3",
          "10",
          "9",
          "8",
          "7",
          "6",
          "2",
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      },
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          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-69809.json"
        }
      ],
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          "date": "2026-09-08T07:00:00.000Z",
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          "product_ids": [
            "2",
            "1"
          ],
          "url": "https://support.microsoft.com/help/5124012"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 6.5,
            "userInteraction": "NONE",
            "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": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7",
            "8",
            "9",
            "10",
            "11",
            "12"
          ]
        }
      ],
      "title": "Windows Active Directory Domain Services Denial of Service Vulnerability"
    }
  ]
}

CVE-2026-69809 (GCVE-0-2026-69809)

Vulnerability from cvelistv5 – Published: 2026-09-08 17:16 – Updated: 2026-10-01 22:58

Title

Windows Active Directory Domain Services Denial of Service Vulnerability

Summary

Missing release of memory after effective lifetime in Active Directory Domain Services allows an unauthorized attacker to deny service over a network.

Severity

7.5 (High)


                        
                          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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-08 20:39 UTC

CWE

CWE-401 - Missing Release of Memory after Effective Lifetime

Assigner

microsoft mitre root Scorecard

References

1 reference

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

Impacted products

8 products

Vendor	Product	Version
Microsoft	Windows 11 version 23H2	Affected: 10.0.22631.0 , < 10.0.22631.7582 (custom)
Microsoft	Windows 11 Version 23H2	Affected: 10.0.22631.0 , < 10.0.22631.7582 (custom)
Microsoft	Windows 11 Version 24H2	Affected: 10.0.26100.0 , < 10.0.26100.9445 (custom)
Microsoft	Windows 11 Version 25H2	Affected: 10.0.26200.0 , < 10.0.26200.9445 (custom)
Microsoft	Windows 11 version 26H1	Affected: 10.0.28000.0 , < 10.0.28000.2954 (custom)
Microsoft	Windows Server 2022	Affected: 10.0.20348.0 , < 10.0.20348.5622 (custom)
Microsoft	Windows Server 2025	Affected: 10.0.26100.0 , < 10.0.26100.33438 (custom)
Microsoft	Windows Server 2025 (Server Core installation)	Affected: 10.0.26100.0 , < 10.0.26100.33438 (custom)

Date Public

2026-09-08 14:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      {
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          {
            "other": {
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                "id": "CVE-2026-69809",
                "options": [
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                  },
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-08T20:39:51.183109Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
      }
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    "cna": {
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            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
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            {
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              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
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          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 version 26H1",
          "vendor": "Microsoft",
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        },
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          "product": "Windows Server 2022",
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        {
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          "product": "Windows Server 2025",
          "vendor": "Microsoft",
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          ]
        },
        {
          "platforms": [
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          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
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              "status": "affected",
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            }
          ]
        }
      ],
      "cpeApplicability": [
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      ],
      "datePublic": "2026-09-08T14:00:00.000Z",
      "descriptions": [
        {
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          "value": "Missing release of memory after effective lifetime in Active Directory Domain Services allows an unauthorized attacker to deny service over a network."
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          "tags": [
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          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69809"
        }
      ],
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    "datePublished": "2026-09-08T17:16:34.042Z",
    "dateReserved": "2026-08-03T22:50:31.850Z",
    "dateUpdated": "2026-10-01T22:58:29.637Z",
    "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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

MSRC_CVE-2026-69809

CVE-2026-69809 (GCVE-0-2026-69809)

Tags

Sightings

Nomenclature

Related by attack behaviour