In Contiki 3.0, a buffer overflow in the Telnet service allows remote attackers to cause…
Priority LOW 35CWE-120Published · 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-120 and the CVSS impact.
Summary
In Contiki 3.0, a buffer overflow in the Telnet service allows remote attackers to cause a denial of service because the ls command is mishandled when a directory has many files with long names.
Why it matters now
EPSS 0.01291 70th 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-2021-38386
- 2026-10-03 Alias added: GHSA-hj2m-f3h3-95w9
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-2021-38386 · CVE Program
- CVE-2021-38386 · NVD
- FIRST EPSS
- GHSA-hj2m-f3h3-95w9 · GitHub Advisory Database · CC BY 4.0
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