Description
Origin validation error in Windows DNS allows an unauthorized attacker to perform spoofing over a network.
Published: 2026-09-08
Score: 8.1 High
EPSS: < 1% Very Low
KEV: No
Impact: DNS Spoofing
Action: Patch Immediately
AI Analysis

Impact

This vulnerability is an origin validation error in Windows DNS that allows an unauthorized attacker on the same network to forge DNS responses. By bypassing normal origin checks, the attacker can manipulate client name resolution so that traffic is directed to malicious servers, thereby compromising confidentiality and integrity of the affected systems. The flaw is classified as CWE-346, a flaw that permits an attacker to make a system believe it is communicating with a legitimate entity.

Affected Systems

Affected systems include Microsoft Windows 10 Version 1607, Windows 10 Version 1809, Windows Server 2012, Windows Server 2012 Server Core, Windows Server 2012 R2, Windows Server 2012 R2 Server Core, Windows Server 2016, Windows Server 2016 Server Core, Windows Server 2019, Windows Server 2019 Server Core, Windows Server 2022, Windows Server 2025, and Windows Server 2025 Server Core.

Risk and Exploitability

The CVSS score of 8.1 indicates a high severity vulnerability. EPSS is not available, but it is inferred from the official Microsoft advisory that attackers may be prepared to exploit the flaw. The vulnerability is not listed in CISA KEV catalog, suggesting no confirmed active exploitation yet. The required attack vector is network‑based; an attacker must be able to send forged DNS responses over the local network and no authentication is required.

Generated by OpenCVE AI on September 8, 2026 at 23:59 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the Windows update released by Microsoft that addresses CVE-2026-69680 for all affected operating systems.
  • Configure DNS servers to enforce strict origin validation and, where available, enable DNSSEC to ensure response authenticity.
  • Deploy network monitoring to detect anomalous DNS traffic and set alerts for spoofed response patterns.

Generated by OpenCVE AI on September 8, 2026 at 23:59 UTC.

Tracking

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Advisories

No advisories yet.

History

Tue, 22 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*

Thu, 10 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft windows Server 2012 (server Core Installation)
Microsoft windows Server 2012 R2
Microsoft windows Server 2012 R2 (server Core Installation)
Microsoft windows Server 2016 (server Core Installation)
Microsoft windows Server 2019 (server Core Installation)
Microsoft windows Server 2025 (server Core Installation)
Vendors & Products Microsoft windows Server 2012 (server Core Installation)
Microsoft windows Server 2012 R2
Microsoft windows Server 2012 R2 (server Core Installation)
Microsoft windows Server 2016 (server Core Installation)
Microsoft windows Server 2019 (server Core Installation)
Microsoft windows Server 2025 (server Core Installation)

Wed, 09 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 08 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Description Origin validation error in Windows DNS allows an unauthorized attacker to perform spoofing over a network.
Title Windows DNS Spoofing Vulnerability
First Time appeared Microsoft
Microsoft windows 10 1607
Microsoft windows 10 1809
Microsoft windows Server 2012
Microsoft windows Server 2012 R2
Microsoft windows Server 2016
Microsoft windows Server 2019
Microsoft windows Server 2022
Microsoft windows Server 2025
Weaknesses CWE-346
CPEs cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft windows 10 1607
Microsoft windows 10 1809
Microsoft windows Server 2012
Microsoft windows Server 2012 R2
Microsoft windows Server 2016
Microsoft windows Server 2019
Microsoft windows Server 2022
Microsoft windows Server 2025
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}

Subscriptions

Microsoft Windows 10 1607 Windows 10 1809 Windows Server 2012 Windows Server 2012 (server Core Installation) Windows Server 2012 R2 Windows Server 2012 R2 Windows Server 2012 R2 (server Core Installation) Windows Server 2016 Windows Server 2016 (server Core Installation) Windows Server 2019 Windows Server 2019 (server Core Installation) Windows Server 2022 Windows Server 2025 Windows Server 2025 (server Core Installation)
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-09-25T21:36:01.603Z

Reserved: 2026-08-03T21:28:58.727Z

Link: CVE-2026-69680

cve-icon Vulnrichment

Updated: 2026-09-09T18:13:41.335Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-08T18:19:39.613

Modified: 2026-09-24T23:18:18.640

Link: CVE-2026-69680

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-10T20:57:32Z

Weaknesses