Cisco SD-WAN Zero-Day Exploited in Communications Provider Breach
In early 2026, a sophisticated threat actor exploited a zero-day vulnerability (CVE-2026-20245) in Cisco Catalyst SD-WAN Manager to infiltrate a communications service provider's network. The attacker gained root-level access by uploading a malicious CSV file, creating a rogue user account named 'troot,' and potentially achieving undetected visibility into the provider's internal traffic. Cisco has since patched the flaw, but the full extent of the compromise remains unclear due to the attacker's anti-forensic measures. This incident underscores the increasing targeting of edge devices by cyber adversaries, highlighting the need for enhanced security measures in network management platforms. Organizations are urged to prioritize patching, implement robust monitoring, and adopt zero-trust architectures to mitigate similar threats.
Kill Chain