CVE-2026-83886: Windows Update Orchestrator Service Elevation of Privilege Vulnerability
Use after free in Windows Update Orchestrator Service allows an authorized attacker to elevate privileges locally.
Other sources
Windows Update Orchestrator Service Elevation of Privilege 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 10.0.26100.33650Patch KB5126646 - 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 10.0.26200.9711Patch 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 10.0.28000.3231Patch KB5127646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7652Patch KB5126653
Event History
Frequently Asked Questions
Who is exposed to this vulnerability?
Systems running Microsoft Windows 11 or Microsoft Windows Server 2025 are listed as affected. Exploitation is local, so exposure depends on whether an attacker can execute code on the system with authorized access.
What access does an attacker need to exploit it?
The attacker must be authorized and have local access with low privileges. No user interaction is required, but the attack complexity is rated high.
What is the likely impact of successful exploitation?
A successful exploit can elevate the attacker's privileges and has high potential impact on confidentiality, integrity, and availability.