SB20260514104 - Authentication bypass in Cisco Catalyst SD-WAN Controller

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20260514104

SB20260514104 - Authentication bypass in Cisco Catalyst SD-WAN Controller

Published: May 14, 2026 Updated: May 15, 2026

Security Bulletin ID SB20260514104
CSH Severity
Critical
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Critical 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper authentication (CVE-ID: CVE-2026-20182)

CWE-ID: CWE-287 - Improper Authentication

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/U:Red


The vulnerability allows a remote attacker to bypass authentication and obtain administrative privileges.

The vulnerability exists due to improper authentication in the peering authentication mechanism when handling control connection handshaking requests. A remote attacker can send crafted requests to bypass authentication and obtain administrative privileges.

A successful exploit could allow access as an internal, high-privileged, non-root user account and subsequent access to NETCONF to manipulate SD-WAN fabric configuration.

Note, the vulnerability is being actively exploited in the wild.


Remediation

Install update from vendor's website.

References