Critical Cisco SD-WAN bug exploited in zero-day attacks since 2023

Cisco is warning that a critical authentication bypass vulnerability in Cisco Catalyst SD-WAN, tracked as CVE-2026-20127, was actively exploited in zero-day attacks that allowed remote attackers to compromise controllers and add malicious rogue peers to targeted networks.

• Lawrence Abrams
• February 25, 2026
• 01:01 PM
• 0