PoC Exploit Released Cisco SD-WAN 0-Day Vulnerability Exploited in the Wild

A public proof-of-concept (PoC) exploit has been released for CVE-2026-20127, a maximum-severity zero-day vulnerability in Cisco Catalyst SD-WAN Controller and SD-WAN Manager that has been actively exploited in the wild since at least 2023. Cisco Talos is tracking the threat activity under the cluster UAT-8616, describing it as a “highly sophisticated cyber threat actor” targeting critical infrastructure […]

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