What is CVE-2023-52173?

CVE-2023-52173 is a critical-severity vulnerability in Xnview Classic, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-12-29.

How severe is CVE-2023-52173?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Xnview Classic

CVE-2023-52173

XnView Classic before 2.51.3 on Windows has a Write Access Violation at xnview.exe+0x3ADBD0.

Vulnerability class: Buffer Overflow

Published 2023-12-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (45.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.4% 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

Xnview Classic

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

newsgroup.xnview.com/viewtopic.php (Release Notes)
github.com/seyit-sigirci/Vulnerability-Disclosures/blob/main/XNView-Crash-Repor… (Product)

Frequently asked questions

What is CVE-2023-52173?: CVE-2023-52173 is a critical-severity vulnerability in Xnview Classic, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-12-29.
How severe is CVE-2023-52173?: Critical severity. CVSS v3 base score is 9.8 out of 10.