CVE-2026-69534 Windows Program Compatibility Assistant Service Elevation of Privilege Vulnerability
An authorized local attacker can exploit a command injection flaw in the Windows Program Compatibility Assistant Service to elevate privileges.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-69534?
CVE-2026-69534 is a high-severity command injection vulnerability in Microsoft Windows 10 1607, published on 8 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Improper neutralization of special elements used in a command ('command injection') in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.
Weakness: CWE-77
Which versions are affected by CVE-2026-69534?
It affects 12 products.
Products include Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 23h2, Microsoft Windows 11 24h2 and 6 more.
How do I fix CVE-2026-69534?
No fix has been published for CVE-2026-69534 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-69534 being exploited?
There is no known exploitation of CVE-2026-69534 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 10 1607
- CVE-2026-33824 Microsoft Internet Key Exchange (IKE) Service Extensions Double Free
- CVE-2026-21510 Microsoft Windows Shell Protection Mechanism Failure
- CVE-2026-21513 Microsoft MSHTML Framework Protection Mechanism Failure
- CVE-2023-32049 Microsoft Windows Defender SmartScreen Security Feature Bypass
- CVE-2023-29360 Microsoft Streaming Service Untrusted Pointer Dereference
Sources
Also known as GHSA-xmh2-57w7-gqc9.