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VULNERABILITIES

CVE-2026-30040 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NDDVolerionCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA: CISA-ADPCVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://kb.cert.org/vuls/id/936962 [email protected]AdvisoryBundleRemedy
https://www.faststone.org/FSIVDownload.htm [email protected]ProductVendor

Weakness Enumeration

CWE-IDCWE NameSource
CWE-122Heap-based Buffer OverflowCISA-ADP

Affected Products

ProductVersions
FastStone Image Viewer
<= 8.3

CPE

  • cpe:2.3:a:faststone:image_viewer:*:*:*:*:*:*:*:*
  • cpe:2.3:a:faststone:faststone_image_viewer:*:*:*:*:*:*:*:*
  • cpe:2.3:a:faststone_soft:faststone_image_viewer:*:*:*:*:*:*:*:*

Remediation

  • Upgrade: 8.5moderate efforthttps://www.faststonesoft.net/DN/FSViewerSetup85.exe
  • Workaround:low effort

    Run FastStone Image Viewer using a restricted local account and enforce policies to prevent users from downloading or saving JP2 or PSD files from untrusted sources.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-30040
NVD Published Date:
Jun 26, 2026
NVD Last Modified:
Jun 26, 2026
Source:
[email protected]
CVE-2026-30040 Details - Not Deferred