CVE-2001-0375: Cisco Pix Firewall 515

Medium severity, CVSS 5.0. EPSS: 10.3% chance of exploitation in the next 30 days.

Cisco PIX Firewall 515 and 520 with 5.1.4 OS running aaa authentication to a TACACS+ server allows remote attackers to cause a denial of service via a large number of authentication requests.

Affected products

• Cisco Pix Firewall 515: any version
• Cisco Pix Firewall 520: any version

Published 2001-06-18. Last modified 2026-06-16.