CVE-2026-42981 Windows Performance Monitor Remote Code Execution Vulnerability
An integer underflow in Windows Performance Monitor allows remote attackers to execute arbitrary code without authentication.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-42981?
CVE-2026-42981 is a high-severity vulnerability in Microsoft Windows 11 23h2, published on 9 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Integer underflow (wrap or wraparound) in Windows Performance Monitor allows an unauthorized attacker to execute code over a network.
Weakness: CWE-191
Which versions are affected by CVE-2026-42981?
It affects 6 products.
Products include Microsoft Windows 11 23h2, Microsoft Windows 11 24h2, Microsoft Windows 11 25h2, Microsoft Windows 11 26h1, Microsoft Windows Server 2022, Microsoft Windows Server 2025.
How do I fix CVE-2026-42981?
No fix has been published for CVE-2026-42981 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-42981 being exploited?
There is no known exploitation of CVE-2026-42981 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 11 23h2
- CVE-2026-81963 Microsoft Windows Link Following
- CVE-2026-100219 Microsoft QUIC Remote Code Execution Vulnerability
- CVE-2026-96909 Windows BitLocker Remote Code Execution Vulnerability
- CVE-2026-62815 Microsoft QUIC Remote Code Execution Vulnerability
- CVE-2026-45657 Windows Kernel Remote Code Execution Vulnerability
Sources
Also known as GHSA-4vf7-qxxr-9pxc.