CVE-2003-0259: Cisco VPN 3000 Concentrator Series Software

Medium severity, CVSS 5.0. EPSS: 2.1% chance of exploitation in the next 30 days.

Cisco VPN 3000 series concentrators and Cisco VPN 3002 Hardware Client 2.x.x through 3.6.7 allows remote attackers to cause a denial of service (reload) via a malformed SSH initialization packet.

Affected products

• Cisco VPN 3000 Concentrator Series Software: version 2.0 only; version 2.5.2.a only; version 2.5.2.b only; version 2.5.2.c only; version 2.5.2.d only; version 2.5.2.f only; …
• Cisco VPN 3002 Hardware Client: any version
• Cisco VPN 3015 Concentrator: any version
• Cisco VPN 3030 Concentator: any version
• Cisco VPN 3060 Concentrator: any version
• Cisco VPN 3080 Concentrator: any version

Published 2003-05-27. Last modified 2026-06-16.