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CVE-2026-81963

high · 7.8Actively exploited

On the CISA Known Exploited Vulnerabilities catalog

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.

Added 2026-09-08Remediation due 2026-09-22

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

7.8
CVSS
0.4%
EPSS (exploit prob.)
33rd
EPSS percentile
2026-09-08
Published

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-59CWE-284

Affected products

VendorProductAffected versions
microsoftwindows_11_23h2< 10.0.22631.7582
microsoftwindows_11_23h2< 10.0.22631.7582
microsoftwindows_11_24h2< 10.0.26100.9445
microsoftwindows_11_24h2< 10.0.26100.9445
microsoftwindows_11_25h2< 10.0.26200.9445
microsoftwindows_11_25h2< 10.0.26200.9445
microsoftwindows_11_26h1< 10.0.28000.2954
microsoftwindows_11_26h1< 10.0.28000.2954
microsoftwindows_server_2025< 10.0.26100.33438

Check a specific version with /api/v1/cve/match.

References

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-81963