KEV · Actively exploited
CVE-2026-81963
CVE-2026-81963 is actively exploited (CISA KEV catalog), rated high by the vendor: 0 tracked apps concerned, none still exposed on their current version.
- Severity (CVSS)
- 7.8
- Exploitation
- Confirmed
- Tracked apps
- 0
- Still exposed
- 0
Base CVSS ; severity is a vendor rating (different scale)
CISA KEV · EPSS predicts 0.4 %
Vendor bulletin scale : NVD CVSS pending
Windows Update Stack Elevation of Privilege Vulnerability
EPSS
0.39%
predictive model; CISA confirms active exploitation
percentile 33.3%
CISA Known Exploited Vulnerability
- Added to KEV
- 2026-09-08
- Remediation deadline
- 2026-09-22
- Required action
- 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.
- Ransomware
- Unknown (not documented by CISA)
OS versions that fix this CVE
This CVE is resolved by the following OS security releases. Update the OS to at least the listed version.
- Windows Server 2025 Fixed in 10.0.26100.33438
- Windows 11 26H1 · 2026-H1 Fixed in 10.0.28000.2954
- Windows 11 25H2 · 2025-H2 Fixed in 10.0.26200.9445
- Windows 11 24H2 · 2024-H2 Fixed in 10.0.26100.9445
- Windows 11 23H2 · 2023-H2 Fixed in 10.0.22631.7582
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