CVE-2026-101204 FastStone Image Viewer TGA Image FSViewer.exe out-of-bounds
An out-of-bounds read in FastStone Image Viewer's TGA handler allows remote attackers to cause denial of service or disclose information.
- 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-2026-101204?
CVE-2026-101204 is a medium-severity memory corruption vulnerability in FastStone Image Viewer, published on 28 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
A vulnerability was found in FastStone Image Viewer up to 8.3. This affects an unknown function of the file FSViewer.exe of the component TGA Image Handler. The manipulation results in out-of-bounds read. The attack can be launched remotely. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-101204?
How do I fix CVE-2026-101204?
No fix has been published for CVE-2026-101204 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-2026-101204 being exploited?
There is no known exploitation of CVE-2026-101204 in the wild and no public exploit code.
Sources
Also known as GHSA-39cx-9v2h-jx3h.