What is CVE-2022-36947?

CVE-2022-36947 is a critical-severity vulnerability in Faststone Image Viewer, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-08-18.

How severe is CVE-2022-36947?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Faststone Image Viewer

CVE-2022-36947

Unsafe Parsing of a PNG tRNS chunk in FastStone Image Viewer through 7.5 results in a stack buffer overflow.

Vulnerability class: Buffer Overflow

Published 2022-08-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.028 (85.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

www.faststone.org/FSViewerDetail.htm (Product, Release Notes, Vendor Advisory)
wid.cert-bund.de/portal/wid/kurzinformationen (Third Party Advisory)
wid.cert-bund.de/portal/wid/securityadvisory (Third Party Advisory)

Frequently asked questions

What is CVE-2022-36947?: CVE-2022-36947 is a critical-severity vulnerability in Faststone Image Viewer, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-08-18.
How severe is CVE-2022-36947?: Critical severity. CVSS v3 base score is 9.8 out of 10.