What is CVE-2026-30040?

CVE-2026-30040 is a medium-severity vulnerability in N/a, classified under Heap-based Buffer Overflow. CVSS score: 6.5/10. Published 2026-06-26.

How severe is CVE-2026-30040?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Buffer overflow in N/a

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 process via supplying a crafted JPEG 2000 (JP2) file.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.

Affected products

N/a — versions n/a

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-30040?: CVE-2026-30040 is a medium-severity vulnerability in N/a, classified under Heap-based Buffer Overflow. CVSS score: 6.5/10. Published 2026-06-26.
How severe is CVE-2026-30040?: Medium severity. CVSS v3 base score is 6.5 out of 10.