Cisco warns of security vulnerabilities in IOS XR and Contact Center. They allow, for example, privilege escalation or denial-of-service.

Cisco patched four high-severity vulnerabilities in IOS XR software that could lead to DoS conditions, command execution, or device takeover.

Network administrators have been urged to immediately patch a critical vulnerability in Cisco's IOS and IOS XE software that could allow attackers to compromise network devices or crash them entirely.