CVE-2026-83793: Windows Update Orchestrator Service Elevation of Privilege Vulnerability
Improper link resolution before file access ('link following') 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 10.0.26300.9711Patch 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 10.0.28000.3231Patch 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 10.0.26100.33650Patch 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 10.0.19044.7807Patch KB5126657 - 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
Which systems should be reviewed for exposure?
Review Microsoft Windows 10, Windows 11, Windows Server 2022, and Windows Server 2025 systems that use the Microsoft Windows Update Orchestrator Service.
What access and conditions does an attacker need?
The attacker must already have local authorized access with low privileges. Exploitation does not require user interaction, but has high attack complexity.
Is this a remote attack path, and what is the potential impact?
The attack vector is local, not network-based. Successful exploitation can result in high impacts to confidentiality, integrity, and availability, while the security scope remains unchanged.