Is CVE-2021-42144 actively exploited?

No active exploitation of CVE-2021-42144 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-42144 be exploited remotely?

Yes. CVE-2021-42144 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-42144?

CVE-2021-42144 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2021-42144

CRITICAL

CVE-2021-42144

CWE-125Published: January 24, 2024· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Buffer over-read vulnerability in Contiki-NG tinyDTLS through master branch 53a0d97 allows attackers obtain sensitive information via crafted input to dtls_ccm_decrypt_message().

NVD Source

Technical Analysis

CVE-2021-42144 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.