What is CVE-2017-8766?

CVE-2017-8766 is a high-severity vulnerability in Irfanview, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2017-07-05.

How severe is CVE-2017-8766?

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

Buffer overflow in Irfanview

CVE-2017-8766

IrfanView version 4.44 (32bit) allows remote attackers to execute code via a crafted .mov file, because of a "User Mode Write AV near NULL" issue.

Vulnerability class: Buffer Overflow

Published 2017-07-05 · 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: 0.017 (76.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Irfanview — versions 4.44

Weakness classification (CWE)

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

References

github.com/wlinzi/security_advisories/tree/master/CVE-2017-8766 (Third Party Advisory)

Frequently asked questions

What is CVE-2017-8766?: CVE-2017-8766 is a high-severity vulnerability in Irfanview, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2017-07-05.
How severe is CVE-2017-8766?: High severity. CVSS v3 base score is 7.8 out of 10.