CVE-2026-30040

MEDIUM

FastStone Image Viewer 8.3 - Heap-based Buffer Overflow via Crafted JP2 File

Title source: llm

Description

A heap overflow in the FSViewer.exe process of FastStone Image Viewer v8.3 allows attackers to cause a execute arbitrary code in the context of the current process via supplying a crafted JPEG 2000 (JP2) file.

References (2)

Core 2

Core References

https://www.faststone.org/FSIVDownload.htm

https://kb.cert.org/vuls/id/936962

Scores

CVSS v3 6.5

EPSS 0.0045

EPSS Percentile 37.2%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-122

Status published

Published Jun 26, 2026

Tracked Since Jun 26, 2026