FastStone has 5 CVEs on record. 5 were published in the last 90 days. The busiest recent month was September 2026 with 4. The median CVSS is 6.3 (medium). None have a confirmed exploitation report. The dominant weakness classes are CWE-119 (5) and CWE-125 (3).
CVEs per month
Last 12 months, by publish date
- Exploited share
- 0% vs 1% corpus
- Median CVSS
- 6.3
- Publish → KEV
- —
- Last 90 days
- 5 prev 0
Worst active — by depth score
CVE-2026-116463Medium· 6.3FastStone Image Viewer Box-Average Downsampler FUN_0062d96c out-of-bounds35CVE-2026-101205Medium· 6.3A vulnerability was determined in FastStone Image Viewer up to 8.335CVE-2026-101204Medium· 6.3A vulnerability was found in FastStone Image Viewer up to 8.335CVE-2026-101203Medium· 6.3A vulnerability has been found in FastStone Image Viewer up to 8.335CVE-2026-101202Medium· 6.3A flaw has been found in FastStone Image Viewer up to 8.335
FastStone vulnerabilities
CVEs affecting FastStone, newest first. Open any entry for full detail, references, and exploit status.
5 CVEsRSS
CVE-2026-116463Medium· 6.3FastStone Image Viewer Box-Average Downsampler FUN_0062d96c out-of-bounds
A vulnerability was identified in FastStone Image Viewer up to 8.5. Affected is the function FUN_0062d96c of the component Box-Average Downsampler Engine. The manipulation leads to out-of-bounds read. It is possible to initiate the attac…
CVE-2026-101205Medium· 6.3A vulnerability was determined in FastStone Image Viewer up to 8.3
A vulnerability was determined in FastStone Image Viewer up to 8.3. This impacts an unknown function of the component PCX Decoder. This manipulation causes out-of-bounds read. The attack may be initiated remotely. The vendor was contacte…
CVE-2026-101204Medium· 6.3A vulnerability was found in FastStone Image Viewer up to 8.3
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 remot…
CVE-2026-101203Medium· 6.3A vulnerability has been found in FastStone Image Viewer up to 8.3
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 v…
CVE-2026-101202Medium· 6.3A flaw has been found in FastStone Image Viewer up to 8.3
A flaw has been found in FastStone Image Viewer up to 8.3. The affected element is an unknown function of the component TGA Image Handler. Executing a manipulation can lead to out-of-bounds write. It is possible to launch the attack remo…