Cisco ships seven IOS XR hardening CVEs, two reach CVSS 9.8

On September 2, 2026, Cisco bundled seven internally discovered IOS XR vulnerabilities into seven CVEs grouped by CWE class, including two at CVSS 9.8 that affect every release of the core-router operating system. Apply the SMUs in your maintenance windows rather than waiting for releases 26.2.2 and 26.3.1.