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CVE-2026-20127: Cisco Catalyst SD-WAN Exploited — Patch Guide
WatchTowr reports widespread exploitation attempts targeting a recent CVE-2026-20127 vulnerability in Cisco Catalyst SD-WAN devices, urging immediate action.

Cisco SD-WAN Zero-Day Under Exploitation for 3 Years
A critical zero-day vulnerability, CVE-2026-20127, in Cisco SD-WAN has been actively exploited by a sophisticated threat actor for three years.

Cisco SD-WAN Zero-Day CVE-2026-20127 Exploited for Admin Access
CVE-2026-20127 is a critical CVSS 10.0 flaw in Cisco SD-WAN controllers exploited since 2023, allowing unauthenticated remote administrative access.
Cisco SD-WAN Exploitation: Critical Authentication Bypass & Escalation
CISA alerts on active global exploitation of Cisco SD-WAN, leveraging CVE-2026-20127 for initial access and CVE-2022-20775 for privilege escalation. Immediate action is
CISA Adds Two Cisco SD-WAN Exploits to KEV Catalog
CISA adds CVE-2022-20775 (Path Traversal) and CVE-2026-20127 (Auth Bypass) affecting Cisco SD-WAN to its Known Exploited Vulnerabilities Catalog.
Critical Cisco SD-WAN Zero-Day Exploited Since 2023
Cisco Catalyst SD-WAN critical authentication bypass (CVE-2026-20127) actively exploited since 2023, enabling remote compromise and rogue peer addition.