CVE-2026-30040

MEDIUM

6.5

CVSS Score

Published: June 26, 2026 at 12:00 AM UTC

Updated: June 27, 2026 at 11:42 AM UTC

1 product affected across 1 vendorImage Viewer

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Severity

MEDIUM6.5

Exploit prediction

EPSS 0.5%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Image Viewer · Faststone

90%

8.3

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Source: cverecord

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

Source: cverecord

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

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMCISA-ADP

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: LOW
Availability: LOW

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-122

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