CVE-2026-30040

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…

Medium · published June 26, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
39.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00465 · 39.3th percentile
Published
2026-06-26T00:00Z
EPSS history
Timeline
  • 26 JUN 00:00Z
    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…
    cvelistv5