CVE-2026-70351 Microsoft WebP Image Extension Remote Code Execution Vulnerability
An integer overflow in the Microsoft WebP Image Extension allows remote attackers to execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-70351?
CVE-2026-70351 is a high-severity vulnerability in Microsoft WebP Image Extension, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Integer overflow or wraparound in Microsoft WebP Image Extension allows an unauthorized attacker to execute code over a network.
Which versions are affected by CVE-2026-70351?
It affects 1 product.
Products include Microsoft Webp Image Extension.
How do I fix CVE-2026-70351?
No fix has been published for CVE-2026-70351 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-70351 being exploited?
There is no known exploitation of CVE-2026-70351 in the wild and no public exploit code.
Other vulnerabilities in Microsoft WebP Image Extension
Sources
Also known as GHSA-j24m-jgmw-jc5f.