What is CVE-2021-29358?

CVE-2021-29358 is a medium-severity vulnerability in Irfanview, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2021-09-28.

How severe is CVE-2021-29358?

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

Out-of-bounds Read in Irfanview

CVE-2021-29358

A buffer overflow vulnerability in FORMATS!ReadPVR_W+0xfa of Irfanview 4.57 allows attackers to cause a denial of service (DOS) via a crafted PVR file.

Vulnerability class: Buffer Overflow

Published 2021-09-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (50.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Irfanview — versions 4.57

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

github.com/moshekaplan/Research/tree/main/IrfanView (Third Party Advisory)

Frequently asked questions

What is CVE-2021-29358?: CVE-2021-29358 is a medium-severity vulnerability in Irfanview, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2021-09-28.
How severe is CVE-2021-29358?: Medium severity. CVSS v3 base score is 5.5 out of 10.