In Contiki 3.0, a Telnet server that silently quits (before disconnection with clients)…
Priority LOW 35CWE-835Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-835.
Summary
In Contiki 3.0, a Telnet server that silently quits (before disconnection with clients) leads to connected clients entering an infinite loop and waiting forever, which may cause excessive CPU consumption.
Why it matters now
EPSS 0.00961 61st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
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-os:contiki:3.0:*:*:*:*:*:*:* | 3.0 | Vulnerable | Contiki-os |
- cpe:2.3:o:contiki-os:contiki:3.0:*:*:*:*:*:*:* Versions 3.0 Vulnerable ·Contiki-os
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-38387
- 2026-10-03 Alias added: GHSA-mh86-qhjh-fvr5
References
More Contiki-os Contiki vulnerabilities
- TI-2020-14885 An issue was discovered in Contiki through 3.0 and Contiki-NG through 4.5. CVSS 3.1CRITICAL 9.8
- TI-2019-06001 An issue was discovered in Contiki-NG through 4.3 and Contiki through 3.0. CVSS 3.1CRITICAL 9.8
- TI-2020-10954 An issue was discovered in Contiki through 3.0. CVSS 3.1HIGH 7.5
- TI-2020-10955 An issue was discovered in Contiki through 3.0. CVSS 3.1HIGH 7.5
- TI-2019-06643 An issue was discovered in Contiki-NG through 4.3 and Contiki through 3.0. CVSS 3.1HIGH 7.5
- TI-2021-09524 An issue was discovered in Contiki through 3.0. CVSS 3.1HIGH 7.5
Sources
- CVE-2021-38387 · CVE Program
- CVE-2021-38387 · NVD
- FIRST EPSS
- GHSA-mh86-qhjh-fvr5 · GitHub Advisory Database · CC BY 4.0
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