CVE-2021-20308: Debian Linux

Critical severity, CVSS 9.8. EPSS: 2.5% chance of exploitation in the next 30 days.

Integer overflow in the htmldoc 1.9.11 and before may allow attackers to execute arbitrary code and cause a denial of service that is similar to CVE-2017-9181.

Affected products

• Debian Debian Linux: version 9.0 only
• Htmldoc Project Htmldoc: up to and including 1.9.11

Published 2021-04-05. Last modified 2026-06-17.