What is CVE-2019-9966?

CVE-2019-9966 is a high-severity vulnerability in Microsoft Windows, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2019-03-24.

How severe is CVE-2019-9966?

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

Buffer overflow in Microsoft Windows

CVE-2019-9966

XnView Classic 2.48 on Windows allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted file, related to xnview+0x38536c.

Vulnerability class: Buffer Overflow

Published 2019-03-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.014 (71.8th percentile), scored 2026-09-28.

Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 71.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Microsoft Windows
Xnview Classic — versions 2.48

Weakness classification (CWE)

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

References

code610.blogspot.com/2019/03/crashing-xnview-248.html (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-9966?: CVE-2019-9966 is a high-severity vulnerability in Microsoft Windows, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2019-03-24.
How severe is CVE-2019-9966?: High severity. CVSS v3 base score is 7.8 out of 10.