What’s Vulnerable › Vulnerabilities
CVE-2021-38311
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.9% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2021-08-09 · updated 2026-06-17
- Weakness: CWE-835
Description
In Contiki 3.0, potential nonterminating acknowledgment loops exist in the Telnet service. When the negotiated options are already disabled, servers still respond to DONT and WONT requests with WONT or DONT commands, which may lead to infinite acknowledgment loops, denial of service, and excessive CPU consumption.
Affected products
- Contiki-Os Contiki: 3.0
References
Get alerted when CVE-2021-38311 or the next vulnerability affects your stack