CVE-2005-0468: Ncsa Telnet

High severity, CVSS 7.5. EPSS: 27.1% chance of exploitation in the next 30 days.

Heap-based buffer overflow in the env_opt_add function in telnet.c for various BSD-based Telnet clients allows remote attackers to execute arbitrary code via responses that contain a large number of characters that require escaping, which consumers more memory than allocated.

Affected products

• Ncsa Telnet: version c only

Published 2005-05-02. Last modified 2026-06-16.