Quick answers
- Is CVE-2026-101204 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-101204 being exploited in the wild.
- How severe is CVE-2026-101204?
- Medium severity, with a CVSS score of 6.3, published 28 September 2026.
- Which products and versions are affected?
- Faststone Image Viewer up to 8.3.
- Is there a fix for CVE-2026-101204?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-101204 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-101204?
- Check whether you run Faststone Image Viewer at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
An out-of-bounds read vulnerability exists in FSViewer.exe's TGA image handler component. The flaw can be triggered remotely by providing a specially crafted TGA file without requiring authentication or user interaction. The vulnerability allows reading memory outside allocated bounds, potentially exposing sensitive data or causing a denial of service.
Affected products
- FastStone Image Viewer up to 8.3
Timeline
- 2026-09-28: disclosed