What is CVE-2020-23549?

CVE-2020-23549 is a high-severity vulnerability in Irfanview. CVSS score: 7.8/10. Published 2021-10-28.

How severe is CVE-2020-23549?

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

Is CVE-2020-23549 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Irfanview

CVE-2020-23549

IrfanView 4.54 allows attackers to cause a denial of service or possibly other unspecified impacts via a crafted .cr2 file, related to a "Data from Faulting Address controls Branch Selection starting at FORMATS!GetPlugInInfo+0x00000000000047f6".

Published 2021-10-28 · last modified 2026-06-17.

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: 0.010 (60.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Irfanview — versions 4.54

Public proof-of-concept exploits

nhiephon/Research

References

www.irfanview.com/plugins.htm (Vendor Advisory)
github.com/nhiephon/Research/blob/master/README.md (Third Party Advisory)

Frequently asked questions

What is CVE-2020-23549?: CVE-2020-23549 is a high-severity vulnerability in Irfanview. CVSS score: 7.8/10. Published 2021-10-28.
How severe is CVE-2020-23549?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2020-23549 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.