CVE-2009-3163: Silcnet Silc Client

High severity, CVSS 7.5. EPSS: 4.5% chance of exploitation in the next 30 days.

Multiple format string vulnerabilities in lib/silcclient/command.c in Secure Internet Live Conferencing (SILC) Toolkit before 1.1.10, and SILC Client 1.1.8 and earlier, allow remote attackers to execute arbitrary code via format string specifiers in a channel name, related to (1) silc_client_command_topic, (2) silc_client_command_kick, (3) silc_client_command_leave, and (4) silc_client_command_users.

Affected products

• Silcnet Silc Client: up to and including 1.1.8; version 1.1.1 only; version 1.1.2 only; version 1.1.3 only; version 1.1.4 only; version 1.1.6 only; …
• Silcnet Silc Toolkit: up to and including 1.1.9; version 1.1 only; version 1.1.1 only; version 1.1.2 only; version 1.1.3 only; version 1.1.4 only; …

Published 2009-09-10. Last modified 2026-06-16.