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2.1
CVE-2026-101203: FastStone Image Viewer allows remote memory overwrite
CVE-2026-101203 · published 20 days ago
Summary
FastStone Image Viewer versions up to 8.3 contain a flaw in its image‑decoding code that can write data outside of its intended memory area. An attacker on the network could trigger this and potentially cause the program to crash or run unwanted code. Update to a newer version or apply the vendor’s patch as soon as it is available.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| faststone | image viewer | 8.0 |
Original advisory text
FastStone Image Viewer 1bpp RLE Decoder out-of-bounds write
A vulnerability has been found in FastStone Image Viewer up to 8.3. The impacted element is an unknown function of the component 1bpp RLE Decoder. The manipulation leads to out-of-bounds write. The attack can be initiated remotely. The vendor was contacted early about this disclosure but did not respond in any way.
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker partial control
Type
CWE-119Buffer Overflow
CWE-787Out-of-bounds Write
Timeline
Published28 Sep 2026
Updated19 Oct 2026
First seen28 Sep 2026
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