Description
Missing authorization in DNS Server allows an authorized attacker to perform tampering locally.
Published: 2026-10-13
Score: 5.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Local DNS tampering
Action: Apply patch
AI Analysis

Impact

The vulnerability is a missing authorization check in the Windows DNS Server that permits an authorized local attacker to tamper with DNS configuration. This flaw allows modification of DNS settings on the host but does not provide remote code execution.

Affected Systems

Affected systems include Microsoft Windows 10 versions 1607 and 1809, and Windows Server editions from 2012 through 2025, whether fully installed or server‑core installations.

Risk and Exploitability

The CVSS score of 5.5 indicates a moderate severity, while the EPSS score is not available and the vulnerability is not listed in the CISA KEV catalog. Exploitation requires the attacker to have authorized local access, making it a local privilege escalation risk rather than a remote threat. The lack of a publicly disclosed exploit suggests the immediate likelihood of attack is lower but not negligible in environments where DNS servers run on systems with broader user privileges.

Generated by OpenCVE AI on October 14, 2026 at 11:53 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the latest Microsoft Windows security updates that address CVE-2026-96926.
  • Ensure the DNS server service runs under the least privileged account and limit local user permissions to modify DNS data.
  • Consider isolating DNS services on dedicated machines or restricting local user access to critical DNS configuration files.

Generated by OpenCVE AI on October 14, 2026 at 11:53 UTC.

Tracking

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Advisories

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History

Sat, 17 Oct 2026 02:45:00 +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)

Fri, 16 Oct 2026 19:45:00 +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:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:*

Wed, 14 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Tue, 13 Oct 2026 19:15:00 +0000

Type Values Removed Values Added
Description Missing authorization in DNS Server allows an authorized attacker to perform tampering locally.
Title Role: DNS Server Tampering 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-862
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': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/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: 2026-10-31T18:11:34.812Z

Reserved: 2026-09-23T20:30:01.467Z

Link: CVE-2026-96926

cve-icon Vulnrichment

Updated: 2026-10-13T19:40:09.928Z

cve-icon NVD

Status : Analyzed

Published: 2026-10-13T19:22:04.223

Modified: 2026-10-16T19:36:22.290

Link: CVE-2026-96926

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-17T02:30:13Z

Weaknesses