What is CVE-2023-26974?

CVE-2023-26974 is a medium-severity vulnerability in Irfanview, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.5/10. Published 2023-04-04.

How severe is CVE-2023-26974?

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

Buffer overflow in Irfanview

CVE-2023-26974

Irfanview v4.62 allows a user-mode write access violation via a crafted JPEG 2000 file starting at JPEG2000+0x0000000000001bf0.

Vulnerability class: Buffer Overflow

Published 2023-04-04 · 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: 0.006 (43.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Irfanview — versions 4.62

Weakness classification (CWE)

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

References

github.com/overXsky/IrfanviewPoc (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-26974?: CVE-2023-26974 is a medium-severity vulnerability in Irfanview, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.5/10. Published 2023-04-04.
How severe is CVE-2023-26974?: Medium severity. CVSS v3 base score is 5.5 out of 10.