Cisco SD-WAN Zero-Day CVE-2026-20127 Exploited Since 2023 for Admin Access
Summary
A zero-day vulnerability, CVE-2026-20127, affecting Cisco Catalyst SD-WAN Controller and Manager has been actively exploited since 2023. The flaw, with a CVSS score of 10.0, allows unauthenticated remote attackers to bypass authentication and gain administrative access.
IFF Assessment
FOE
The active exploitation of a critical zero-day vulnerability is bad news for defenders.
Severity
10.0
Critical
Defender Context
Defenders should immediately patch the affected Cisco SD-WAN components and monitor for signs of compromise. Zero-day exploits, especially those leading to administrative access, pose a significant risk and require swift action to mitigate potential damage and prevent further exploitation.