What is CVE-2021-46064?

CVE-2021-46064 is a high-severity vulnerability in Irfanview, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2022-03-23.

How severe is CVE-2021-46064?

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

Buffer overflow in Irfanview

CVE-2021-46064

IrfanView 4.59 is vulnerable to buffer overflow via the function at address 0x413c70 (in 32bit version of the binary). The vulnerability triggers when the user opens malicious .tiff image.

Vulnerability class: Buffer Overflow

Published 2022-03-23 · last modified 2026-07-09.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (65.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Irfanview — versions 4.59

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

af854a3a-2127-422b-91ae-364da2661108 (Product)
af854a3a-2127-422b-91ae-364da2661108 (Product, URL Repurposed)
www.irfanview.info/main_history.htm (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2021-46064?: CVE-2021-46064 is a high-severity vulnerability in Irfanview, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2022-03-23.
How severe is CVE-2021-46064?: High severity. CVSS v3 base score is 7.8 out of 10.