What is CVE-2021-27224?

CVE-2021-27224 is a high-severity vulnerability in Irfanview, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2021-02-17.

How severe is CVE-2021-27224?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Irfanview

CVE-2021-27224

The WPG plugin before 3.1.0.0 for IrfanView 4.57 has a user-mode write access violation starting at WPG+0x0000000000012ec6, which might allow remote attackers to execute arbitrary code.

Vulnerability class: Buffer Overflow

Published 2021-02-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.380 (98.5th percentile), scored 2026-09-29.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.380 · newest: 0.380 · change: 0.000

Affected products

Irfanview — versions 4.57
Irfanview Wpg

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

www.irfanview.com/plugins.htm (Vendor Advisory)
sec-consult.com/vulnerability-lab/advisory/multiple-vulnerabilities-irfanview-w… (Exploit, Third Party Advisory)
packetstormsecurity.com/files/161449/IrfanView-4.57-Denial-Of-Service-Code-Exec… (Exploit, VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2021-27224?: CVE-2021-27224 is a high-severity vulnerability in Irfanview, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2021-02-17.
How severe is CVE-2021-27224?: High severity. CVSS v3 base score is 7.5 out of 10.