CVE-2026-81963
Description
Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally.
How to fix
Apply 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.
CISA due date: Sep 22, 2026- microsoft windows_11_23h210.0.22631.7582 or later
- microsoft windows_11_24h210.0.26100.9445 or later
- microsoft windows_11_25h210.0.26200.9445 or later
- microsoft windows_11_26h110.0.28000.2954 or later
- microsoft windows_server_202510.0.26100.33438 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_11_23h2 | v < 10.0.22631.7582 | 10.0.22631.7582 |
| microsoft windows_11_24h2 | v < 10.0.26100.9445 | 10.0.26100.9445 |
| microsoft windows_11_25h2 | v < 10.0.26200.9445 | 10.0.26200.9445 |
| microsoft windows_11_26h1 | v < 10.0.28000.2954 | 10.0.28000.2954 |
| microsoft windows_server_2025 | v < 10.0.26100.33438 | 10.0.26100.33438 |
Check your version
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Attack Surface Management
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