Cisco IOS XR

Top 10 Security Stories: Critical Flaws in PaperCut NG/MF, Chrome, WatchGuard and Others Dominate Week

Security NEXT has published its weekly ranking of the ten most-read articles between August 30 and September 5 2026. The list is led by a critical vulnerability in PaperCut NG/MF that is already being exploited in the wild. Google Chrome received two separate updates addressing 38 vulnerabilities, including two rated Critical and one zero-day. WatchGuard Fireware OS, SonicWall SMA 1000, Cisco IOS XR and Apache Tomcat also received urgent patches for severe flaws. Three real-world incidents made the top ten: a customer-data breach at 01 Bank, a ransomware infection at Hands HD and a suspected cloud leak at Corona. The ranking reflects strong reader interest in both newly disclosed vulnerabilities and confirmed exploitation cases.

Cisco Issues Security Updates for IOS XR Fixing Multiple Critical Vulnerabilities

Cisco Systems has released security updates for its network operating system Cisco IOS XR to address multiple vulnerabilities discovered through internal research. The update, published on September 2, 2026, classifies the flaws into seven categories, each assigned distinct CVE identifiers. Two vulnerabilities, CVE-2026-20274 and CVE-2026-20279, received the highest CVSS v3.1 base score of 9.8 and are rated Critical. Additional issues include command injection flaws rated 8.8 and other weaknesses scoring between 8.2 and 8.6. No exploitation has been observed at the time of disclosure. Cisco is distributing Software Maintenance Updates and plans to include fixes in upcoming releases 26.3.1 and 26.2.2.