Cyber Resilience

CVE-2021-42144

Critical

Published: 24 January 2024

Published
24 January 2024
Modified
20 June 2025
KEV Added
—
Patch
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CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0009 26.4th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-42144 is a critical-severity Out-of-bounds Read (CWE-125) vulnerability in Contiki-Ng Contiki-Ng Tinydtls. Its CVSS base score is 9.8 (Critical).

Operationally, ranked at the 26.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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().

CWE(s)
CWE-125

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

contiki-ng
contiki-ng tinydtls
≤ 2018-08-30

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References