CVE-1999-0230: Cisco IOS

Medium severity, CVSS 5.0. EPSS: 1.1% chance of exploitation in the next 30 days.

Buffer overflow in Cisco 7xx routers through the telnet service.

Affected products

• Cisco IOS: version 4.1 only; version 4.1.1 only; version 4.1.2 only

Published 1997-12-15. Last modified 2026-06-16.