What is CVE-2021-26237?

CVE-2021-26237 is a high-severity vulnerability in Faststone Image Viewer, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-03-18.

How severe is CVE-2021-26237?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Faststone Image Viewer

CVE-2021-26237

FastStone Image Viewer <= 7.5 is affected by a user mode write access violation at 0x00402d7d, triggered when a user opens or views a malformed CUR file that is mishandled by FSViewer.exe. Attackers could exploit this issue for a Denial of Service (DoS) or possibly to achieve code execution.

Vulnerability class: Buffer Overflow

EPSS: 0.027 (84.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Faststone Image_viewer
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-26237?: CVE-2021-26237 is a high-severity vulnerability in Faststone Image Viewer, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-03-18.
How severe is CVE-2021-26237?: High severity. CVSS v3 base score is 7.8 out of 10.