CVE-2026-72934: Windows Program Compatibility Assistant Service Elevation of Privilege Vulnerability
Use after free in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.
Other sources
Windows Program Compatibility Assistant 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 10.0.26100.9711Patch 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 - 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 10.0.26200.9711Patch KB5127648
Event History
Frequently Asked Questions
Who is exposed to this vulnerability?
Systems running Microsoft Windows 11 or Microsoft Windows Server 2025 are identified as affected. Exploitation is local, so the attacker must already be able to run code or otherwise act on the target system as an authorized user.
What access does an attacker need to exploit it?
The attacker needs local access and 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 on the affected system. The supplied vector rates confidentiality, integrity, and availability impacts as high.