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CVE-2026-20129

Severity CVSS v4.0:
Pending analysis
Type:
CWE-287 Authentication Issues
Publication date:
25/02/2026
Last modified:
04/03/2026

Description

A vulnerability in the API user authentication of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to gain access to an affected system as a user who has the&amp;nbsp;netadmin role.<br /> <br /> The vulnerability is due to improper authentication for requests that are sent to the API. An attacker could exploit this vulnerability by sending a crafted request to the API of an affected system. A successful exploit could allow the attacker to execute commands with the privileges of the netadmin role.<br /> Note: Cisco Catalyst SD-WAN Manager releases 20.18 and later are not affected by this vulnerability.&amp;nbsp;

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 9.80 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
9.80
Severity 3.x
CRITICAL

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:* 20.9.8.2 (excluding)
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:* 20.11 (including) 20.12.5.3 (excluding)
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:* 20.13 (including) 20.15.4.2 (excluding)
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:* 20.16 (including) 20.18 (excluding)
cpe:2.3:a:cisco:catalyst_sd-wan_manager:20.12.6:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools