CVE-2021-38311

HighCVSS 7.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-835

Affected software

No affected versions have been published.

Timeline

Published
Aug 9, 2021
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2021-38311: High severity, CVSS 7.5 | Vulnix