CVE-2026-69858

Use after free in Windows DNS allows an unauthorized attacker to execute code over a network.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69858	Vendor Advisory Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:microsoft:windows_server_2022:::::::x64:*
	cpe:2.3:o:microsoft:windows_server_2025:::::::x64:*

History

16 Sep 2026, 17:32

Type	Values Removed	Values Added
First Time		Microsoft windows Server 2022 Microsoft Microsoft windows Server 2025
References	~~() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69858 -~~	() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69858 - Vendor Advisory, Patch
CPE		cpe:2.3:o:microsoft:windows_server_2022:::::::x64:* cpe:2.3:o:microsoft:windows_server_2025:::::::x64:*

Information

Published : 2026-09-08 18:19

Updated : 2026-09-16 17:32

NVD link : CVE-2026-69858

Mitre link : CVE-2026-69858

CVE.ORG link : CVE-2026-69858

JSON object : View

Products Affected

microsoft

windows_server_2022
windows_server_2025

CWE

CWE-416

Use After Free

{"id": "CVE-2026-69858", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-69858", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-09-09T00:00:00+00:00"}}], "cvssMetricV31": [{"type": "Secondary", "source": "secure@microsoft.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.2}]}, "affected": [{"source": "secure@microsoft.com", "affectedData": [{"vendor": "Microsoft", "product": "Windows Server 2022", "versions": [{"status": "affected", "version": "10.0.20348.0", "lessThan": "10.0.20348.5622", "versionType": "custom"}], "platforms": ["x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows Server 2025", "versions": [{"status": "affected", "version": "10.0.26100.0", "lessThan": "10.0.26100.33438", "versionType": "custom"}], "platforms": ["x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows Server 2025 (Server Core installation)", "versions": [{"status": "affected", "version": "10.0.26100.0", "lessThan": "10.0.26100.33438", "versionType": "custom"}], "platforms": ["x64-based Systems"]}]}], "published": "2026-09-08T18:19:57.143", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69858", "tags": ["Vendor Advisory", "Patch"], "source": "secure@microsoft.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "Use after free in Windows DNS allows an unauthorized attacker to execute code over a network."}], "lastModified": "2026-09-16T17:32:51.910", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "F275C1E8-54D9-4FFE-BAF6-B15CCE91B550", "versionEndExcluding": "10.0.20348.5622"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "65F785F0-374C-45DC-B4B3-D74E64039608", "versionEndExcluding": "10.0.26100.33438"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com"}