What is CVE-2021-42145?

CVE-2021-42145 is a high-severity vulnerability in Contiki-Ng Tinydtls, classified under Improper Handling of Exceptional Conditions. CVSS score: 7.5/10. Published 2024-01-24.

How severe is CVE-2021-42145?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Contiki-Ng Tinydtls

CVE-2021-42145

An assertion failure discovered in in check_certificate_request() in Contiki-NG tinyDTLS through master branch 53a0d97 allows attackers to cause a denial of service.

Published 2024-01-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (34.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 34.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Contiki-Ng Tinydtls

Weakness classification (CWE)

CWE-755 — Improper Handling of Exceptional Conditions

References

seclists.org/fulldisclosure/2024/Jan/18 (Mailing List, Third Party Advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2021-42145?: CVE-2021-42145 is a high-severity vulnerability in Contiki-Ng Tinydtls, classified under Improper Handling of Exceptional Conditions. CVSS score: 7.5/10. Published 2024-01-24.
How severe is CVE-2021-42145?: High severity. CVSS v3 base score is 7.5 out of 10.