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VULNERABILITIES

CVE-2026-81963 Details

Description

Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-81963 CISA-ADPUS Government Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81963 [email protected]PatchVendor Advisory

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.

Vulnerability NameDate AddedDue DateRequired Action
Microsoft Windows Link Following VulnerabilitySep 8, 2026Sep 22, 2026Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Weakness Enumeration

CWE-IDCWE NameSource
CWE-284Improper Access Control[email protected]
CWE-59Improper Link Resolution Before File Access ('Link Following')[email protected]

Affected Products

ProductVersions
microsoft windows 11 23h2
< 10.0.22631.7582

CPE

  • cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*
  • cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*

Remediation

  • No remediation found in references.
microsoft windows 11 24h2
< 10.0.26100.9445

CPE

  • cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*
  • cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*

Remediation

  • No remediation found in references.
microsoft windows 11 25h2
< 10.0.26200.9445

CPE

  • cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*
  • cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*

Remediation

  • No remediation found in references.
microsoft windows 11 26h1
< 10.0.28000.2954

CPE

  • cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*
  • cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*

Remediation

  • No remediation found in references.
microsoft windows server 2025
< 10.0.26100.33438

CPE

  • cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

6 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-81963
NVD Published Date:
Sep 8, 2026
NVD Last Modified:
Sep 9, 2026
Source:
[email protected]
CVE-2026-81963 Details - Not Deferred