CVE-2021-45488: Netbsd

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

In NetBSD through 9.2, there is an information leak in the TCP ISN (ISS) generation algorithm.

Affected products

• Netbsd Netbsd: up to and including 9.2

Published 2021-12-25. Last modified 2026-06-17.