CVE-2026-20126 HIGH

CVE-2026-20126: Cisco Catalyst SD-WAN Manager Privilege Escalation Vulnerability

Vendor Cisco
Product Cisco Catalyst SD-WAN Manager
Weakness CWE-648
Published February 25, 2026
Last update March 20, 2026

CVSS base score

8.8/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

A vulnerability in Cisco Catalyst SD-WAN Manager could allow an authenticated, local attacker with low privileges to gain root privileges on the underlying operating system. This vulnerability is due to an insufficient user authentication mechanism in the REST API. An attacker could exploit this vulnerability by sending a request to the REST API of the affected system. A successful exploit could allow the attacker to gain root privileges on the underlying operating system.

Key dates

02Disclosure timeline

February 25, 2026 CVE published
March 20, 2026 Record updated