CVE-2005-2025: Cisco VPN 3000 Concentrator

Medium severity, CVSS 5.0. EPSS: 2.3% chance of exploitation in the next 30 days.

Cisco VPN 3000 Concentrator before 4.1.7.F allows remote attackers to determine valid groupnames by sending an IKE Aggressive Mode packet with the groupname in the ID field, which generates a response if the groupname is valid, but does not generate a response for an invalid groupname.

Affected products

• Cisco VPN 3000 Concentrator: any version
• 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 3005 Concentrator Software: version 4.0.1 only
• Cisco VPN 3015 Concentrator: any version
• Cisco VPN 3020 Concentrator: any version
• Cisco VPN 3030 Concentator: any version
• Cisco VPN 3060 Concentrator: any version
• Cisco VPN 3080 Concentrator: any version

Published 2005-06-20. Last modified 2026-06-16.