CVE-2018-0180: Cisco IOS Software Denial-of-Service Vulnerability

Medium severity, CVSS 5.9. Actively exploited: in CISA KEV since 2022-03-03. EPSS: 4.9% chance of exploitation in the next 30 days.

Multiple vulnerabilities in the Login Enhancements (Login Block) feature of Cisco IOS Software could allow an unauthenticated, remote attacker to trigger a reload of an affected system, resulting in a denial of service (DoS) condition. These vulnerabilities affect Cisco devices that are running Cisco IOS Software Release 15.4(2)T, 15.4(3)M, or 15.4(2)CG and later. Cisco Bug IDs: CSCuy32360, CSCuz60599.

Affected products

• Cisco IOS: version 15.3(00.00.19)sy only; version 15.4(01)ia001.100 only; version 15.6(01.22)t only; version 15.4(03)m4.1 only; version 15.4(2)cg only; version 15.4(2)t only; …

Published 2018-03-28. Last modified 2026-06-17.