CVE-2026-54124 Windows Terminal Remote Code Execution Vulnerability
An integer overflow in Windows Terminal allows an unauthorized attacker to execute code locally on affected Windows systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-54124?
CVE-2026-54124 is a high-severity vulnerability in Microsoft Windows 10 21h2, published on 14 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Integer overflow or wraparound in Windows Terminal allows an unauthorized attacker to execute code locally.
Which versions are affected by CVE-2026-54124?
It affects 8 products.
Products include Microsoft Terminal, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 24h2, Microsoft Windows 11 25h2, Microsoft Windows 11 26h1 and 2 more.
How do I fix CVE-2026-54124?
No fix has been published for CVE-2026-54124 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-54124 being exploited?
There is no known exploitation of CVE-2026-54124 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 10 21h2
Sources
Also known as GHSA-4895-4gj9-m7gc.