Buffer over-read vulnerability in Contiki-NG tinyDTLS through master branch 53a0d97…
Priority MEDIUM 49CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
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().
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00658 51st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:contiki-ng:contiki-ng_tinydtls:*:*:*:*:*:*:*:* | up to 2018-08-30 | Vulnerable | contiki-ng |
- cpe:2.3:o:contiki-ng:contiki-ng_tinydtls:*:*:*:*:*:*:*:* Versions up to 2018-08-30 Vulnerable ·contiki-ng
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-42144
- 2026-10-03 Alias added: GHSA-7r27-33fg-9cpx
- 2026-10-11 EPSS moved to the 50th–90th percentile
References
Sources
- CVE-2021-42144 · CVE Program
- CVE-2021-42144 · NVD
- FIRST EPSS
- GHSA-7r27-33fg-9cpx · GitHub Advisory Database · CC BY 4.0
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