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CVE-2026-20126 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v	[email protected]	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-648	Incorrect Use of Privileged APIs	[email protected]

Affected Products

Product	Versions
cisco catalyst sd-wan manager	< 20.9.8.2 >= 20.11, < 20.12.5.3 >= 20.13, < 20.15.4.2 >= 20.16, < 20.18.2.1 20.12.6
CPE cpe:2.3:a:cisco:catalyst_sd-wan_manager:::::::: cpe:2.3:a:cisco:catalyst_sd-wan_manager:20.12.6:::::::* Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Mar 4, 2026	Initial Analysis	[email protected]
Feb 25, 2026	New CVE Received	[email protected]