What is CVE-2018-11703?

CVE-2018-11703 is a high-severity vulnerability in Faststone Image Viewer, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2018-06-20.

How severe is CVE-2018-11703?

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

Buffer overflow in Faststone Image Viewer

CVE-2018-11703

FastStone Image Viewer 6.2 has a User Mode Write AV at 0x00402d6a, triggered when the user opens a malformed JPEG file that is mishandled by FSViewer.exe. Attackers could exploit this issue for DoS (Access Violation) or possibly unspecified other impact.

Vulnerability class: Buffer Overflow

Published 2018-06-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (54.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.7% 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 6.2

Weakness classification (CWE)

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

References

github.com/MostafaSoliman/Security-Advisories/tree/master/CVE-2018-11703 (Third Party Advisory)

Frequently asked questions

What is CVE-2018-11703?: CVE-2018-11703 is a high-severity vulnerability in Faststone Image Viewer, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2018-06-20.
How severe is CVE-2018-11703?: High severity. CVSS v3 base score is 7.8 out of 10.