CVE-2000-0955: Cisco Virtual Central Office 4000

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

Cisco Virtual Central Office 4000 (VCO/4K) uses weak encryption to store usernames and passwords in the SNMP MIB, which allows an attacker who knows the community name to crack the password and gain privileges.

Affected products

• Cisco Virtual Central Office 4000: up to and including 5.1.3

Published 2000-12-19. Last modified 2026-09-23.