CVE-2005-0469: Ncsa Telnet

High severity, CVSS 7.5. EPSS: 8.9% chance of exploitation in the next 30 days.

Buffer overflow in the slc_add_reply function in various BSD-based Telnet clients, when handling LINEMODE suboptions, allows remote attackers to execute arbitrary code via a reply with a large number of Set Local Character (SLC) commands.

Affected products

• Ncsa Telnet: any version

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