CVE-2026-81964: Windows Update Orchestrator Service Security Feature Bypass Vulnerability
Use of hard-coded credentials in Windows Update Orchestrator Service allows an authorized attacker to bypass a security feature locally.
Other sources
Windows Update Orchestrator Service Security Feature Bypass Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7807Patch KB5126657 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26300.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5761Patch KB5126655
Event History
Frequently Asked Questions
Who is exposed to this vulnerability?
Systems running Microsoft Windows 10, Windows 11, Windows Server 2022, or Windows Server 2025 are listed as affected.
What access does an attacker need to exploit it?
An attacker must already be authorized on the affected system and have local access. User interaction is not required.
What is the expected impact of successful exploitation?
Successful exploitation allows a local authorized attacker to bypass a security feature. The provided severity vector indicates integrity impact, with no stated confidentiality or availability impact.