What is CVE-2018-15816?

CVE-2018-15816 is a medium-severity vulnerability in Faststone Image Viewer, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.5/10. Published 2019-03-26.

How severe is CVE-2018-15816?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Faststone Image Viewer

CVE-2018-15816

FastStone Image Viewer 6.5 has a Read Access Violation on Block Data Move starting at image00400000+0x0000000000002d7d via a crafted image file.

Vulnerability class: Buffer Overflow

Published 2019-03-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.008 (55.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Faststone Image Viewer — versions 6.5

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

0x00crashes.blogspot.com/2018/08/faststone-image-viewer-65-few-crashes.html (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-15816?: CVE-2018-15816 is a medium-severity vulnerability in Faststone Image Viewer, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.5/10. Published 2019-03-26.
How severe is CVE-2018-15816?: Medium severity. CVSS v3 base score is 5.5 out of 10.