Buffer overflow in Irfanview

CVE-2020-23559

IrfanView 4.54 allows a user-mode write access violation starting at FORMATS!ShowPlugInSaveOptions_W+0x0000000000007d7f.

Vulnerability class: Buffer Overflow

EPSS: 0.003 (24.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

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

Affected products

Irfanview — versions 4.54
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

References

cve@mitre.org (Product, x_refsource_MISC)
cve@mitre.org (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2020-23559?: CVE-2020-23559 is a high-severity vulnerability in Irfanview, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-09-16.
How severe is CVE-2020-23559?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2020-23559 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.