CVE-2009-3051: Silcnet Silc Client

High severity, CVSS 7.5. EPSS: 4.8% chance of exploitation in the next 30 days.

Multiple format string vulnerabilities in lib/silcclient/client_entry.c in Secure Internet Live Conferencing (SILC) Toolkit before 1.1.10, and SILC Client before 1.1.8, allow remote attackers to execute arbitrary code via format string specifiers in a nickname field, related to the (1) silc_client_add_client, (2) silc_client_update_client, and (3) silc_client_nickname_format functions.

Affected products

• Silcnet Silc Client: up to and including 1.1.7; 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.