CVE-2001-0428: Cisco VPN 3000 Concentrator Series Software

Medium severity, CVSS 5.0. EPSS: 1.7% chance of exploitation in the next 30 days.

Cisco VPN 3000 series concentrators before 2.5.2(F) allow remote attackers to cause a denial of service via an IP packet with an invalid IP option.

Affected products

• Cisco VPN 3000 Concentrator Series Software: version 2.5.2.a only; version 2.5.2.b only; version 2.5.2.c only; version 2.5.2.d only

Published 2001-07-02. Last modified 2026-06-16.