Critical Cisco SD-WAN 0-Day Vulnerability Exploited Since 2023 to Gain Root Access

Cisco has disclosed a critical zero-day vulnerability in its Catalyst SD-WAN products that threat actors have exploited since 2023 to bypass authentication and achieve root access. Tracked as CVE-2026-20127, the flaw affects core networking components and prompts urgent patching amid active attacks.sec.cloudapps. CVE-2026-20127 stems from a flaw in the peering authentication mechanism of Cisco Catalyst […]

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