News sources: National Cybersecurity Authority and Cisco Security Advisory
The National Cybersecurity Guidance Center issued security alert 2026-7818 on September 8, 2026, with a high severity rating. Cisco’s advisory addresses multiple vulnerabilities in IOS XE Software, with a maximum CVSS score of 9.8.
Recommended action: Identify devices running Cisco IOS XE, verify the installed software release against Cisco’s fixed-release table, and upgrade to the appropriate corrected release. Cisco states that no workarounds address these vulnerabilities.