CVE-2026-42910 Windows Hotpatch Monitoring Service Elevation of Privilege Vulnerability
An authorized local attacker can exploit an out-of-bounds write in the Windows Hotpatch Monitoring 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-2026-42910?
CVE-2026-42910 is a high-severity memory corruption vulnerability in Microsoft Windows 11 24h2, published on 9 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Out-of-bounds write in Windows Hotpatch Monitoring Service allows an authorized attacker to elevate privileges locally.
Weakness: CWE-787
Which versions are affected by CVE-2026-42910?
It affects 4 products.
Products include Microsoft Windows 11 24h2, Microsoft Windows 11 25h2, Microsoft Windows 11 26h1, Microsoft Windows Server 2025.
How do I fix CVE-2026-42910?
No fix has been published for CVE-2026-42910 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-42910 being exploited?
There is no known exploitation of CVE-2026-42910 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 11 24h2
- CVE-2025-60710 Microsoft Windows Link Following
- CVE-2026-54990 Remote Desktop Client Remote Code Execution Vulnerability
- CVE-2025-50165 Windows Graphics Component Remote Code Execution Vulnerability
- CVE-2025-21311 Windows NTLM V1 Elevation of Privilege Vulnerability
- CVE-2026-108463 Windows SmartScreen Security Feature Bypass Vulnerability
Sources
Also known as GHSA-gv67-34rh-v566.