CVE-2019-13455: Debian Linux

Critical severity, CVSS 9.8. EPSS: 2% chance of exploitation in the next 30 days.

In Xymon through 4.3.28, a stack-based buffer overflow vulnerability exists in the alert acknowledgment CGI tool because of   expansion in acknowledge.c.

Affected products

• Debian Debian Linux: version 8.0 only
• Xymon Xymon: up to and including 4.3.28

Published 2019-08-27. Last modified 2026-06-17.