CVE-2021-42147: Contiki-NG Tinydtls

Critical severity, CVSS 9.1. EPSS: 0.8% chance of exploitation in the next 30 days.

Buffer over-read vulnerability in the dtls_sha256_update function in Contiki-NG tinyDTLS through master branch 53a0d97 allows remote attackers to cause a denial of service via crafted data packet.

Affected products

• Contiki-NG Tinydtls: version 2018-08-30 only

Published 2024-01-24. Last modified 2026-06-17.