🚨 CRITICAL VULNERABILITY ALERT

March 2026 Threat Intelligence

CVE-2026-20127 — Cisco SD-WAN Authentication Bypass

CVSS 10.0 (CRITICAL)

⚡ No Auth Required

🌐 Remote Exploit

💥 Full Network Takeover

Executive Summary

March 2026 has been marked by the discovery of CVE-2026-20127, a critical vulnerability affecting Cisco SD-WAN systems. This flaw allows unauthenticated attackers to bypass authentication and gain administrative access, leading to full network compromise. Due to its CVSS score of 10.0 and infrastructure-level impact, it represents one of the most severe threats observed this month.

🚨 Top Vulnerability

CVE-2026-20127 – Cisco SD-WAN Authentication Bypass

This vulnerability enables attackers to bypass authentication and gain full administrative access to SD-WAN controllers, allowing manipulation of network traffic and disruption of enterprise infrastructure.

CRITICAL (CVSS 10.0)

Reference

NVD Official Page

📊 CVSS

Score: 10.0

AV:N / AC:L / PR:N / UI:N / S:C / C:H / I:H / A:H

🎯 MITRE ATT&CK

T1190 – Exploit Public App
T1078 – Valid Accounts
T1601 – Modify Config
T1565 – Data Manipulation