CVE-2017-6627

Cisco IOS and IOS XE software suffered a high-severity unauthenticated remote denial-of-service vulnerability in UDP packet processing that was actively exploited in the wild.

An unauthenticated remote attacker could cause an interface queue wedge by flooding the input queue with UDP packets, leading to denial of service. DIB organizations must ensure continuous patching of foundational networking infrastructure, as systemic issues in input validation across subsystems like SNMP and DHCP have historically enabled high-severity remote code execution vulnerabilities. This failure highlights the critical need for strict access controls and continuous vulnerability management for hardware and software that underpins network operations.

Shame score — The vulnerability was actively exploited in the wild (KEV) and linked to systemic input validation failures across multiple subsystems, indicating avoidable negligence in foundational software security.