CVE-2026-20129

critical · 9.8

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 netadmin role. 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. Note: Cisco Catalyst SD-WAN Manager releases 20.18 and later are not affected by this vulnerability. 

9.8

CVSS

0.7%

EPSS (exploit prob.)

52nd

EPSS percentile

2026-02-25

Published

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

Weaknesses

CWE-287

Affected products

Vendor	Product	Affected versions
cisco	catalyst_sd-wan_manager	< 20.9.8.2
cisco	catalyst_sd-wan_manager	>= 20.11, < 20.12.5.3
cisco	catalyst_sd-wan_manager	>= 20.13, < 20.15.4.2
cisco	catalyst_sd-wan_manager	>= 20.16, < 20.18
cisco	catalyst_sd-wan_manager	20.12.6

Check a specific version with /api/v1/cve/match.

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-20129