CVE-2020-25112: Contiki-OS

Critical severity, CVSS 9.8. EPSS: 27.9% chance of exploitation in the next 30 days.

An issue was discovered in the IPv6 stack in Contiki through 3.0. There are inconsistent checks for IPv6 header extension lengths. This leads to Denial-of-Service and potential Remote Code Execution via a crafted ICMPv6 echo packet.

Affected products

• Contiki-OS Contiki-OS: up to and including 3.0

Published 2020-12-11. Last modified 2026-06-17.