On February 25, 2026, Cisco released fixes for a maximum severity authentication bypass vulnerability in Cisco Catalyst SD-WAN Controller (formerly vSmart) and Cisco Catalyst SD-WAN Manager (formerly vManage), tracked as CVE-2026-20127. The flaw arises from a broken peering authentication mechanism in the control-plane authentication workflow. This vulnerability potentially allows a remote, unauthenticated threat actor to … CVE-2026-20127: Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability
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Article Link: CVE-2026-20127 | Arctic Wolf