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Vulnerability record · CVE-2026-20129 · published 25 February 2026

CVE-2026-20129: Cisco catalyst sd-wan manager improper authentication vulnerability

Cisco · Catalyst Sd Wan Manager

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 3.1 Critical EPSS 0.75% · top 47.1% CWE-287 · Improper authentication
9.8CVSS 3.1 base score
0.75%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

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 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. 

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2026-20182Cisco Catalyst SD-WAN peering authentication bypass grants admin accessThe peering authentication mechanism in Cisco Catalyst SD-WAN Controller, Manager and Validator does not work properly, allowing crafted requests to …KEVEPSS 92%analysed10.0CVE-2026-20127Cisco Catalyst SD-WAN peering authentication bypassThe peering authentication mechanism in Cisco Catalyst SD-WAN Controller, Manager and Validator does not work properly, letting an unauthenticated re…KEVEPSS 88%analysed7.8CVE-2026-20245Cisco Catalyst SD-WAN CLI command injection via crafted file uploadCisco Catalyst SD-WAN Controller, Manager and Validator fail to properly validate user-supplied input in the CLI, allowing an authenticated local att…KEVEPSS 25%analysed7.8CVE-2022-20775Cisco SD-WAN CLI access control flaw allows root privilege escalationCisco SD-WAN Software has improper access controls on commands within the application CLI, letting an authenticated local attacker run a crafted comm…KEVEPSS 12%analysed7.5CVE-2026-20128Cisco Catalyst SD-WAN Manager DCA credential file exposureCisco Catalyst SD-WAN Manager stores the Data Collection Agent (DCA) user password in a recoverable credential file on the affected system. An unauth…KEVEPSS 7.8%analysed7.5CVE-2026-20133Cisco Catalyst SD-WAN Manager insufficient file system restrictions expose dataCisco Catalyst SD-WAN Software has insufficient file system restrictions that let an attacker read sensitive files on the underlying operating system…KEVEPSS 32%analysed6.5CVE-2026-20262Cisco Catalyst SD-WAN Manager path traversal in file uploadCisco Catalyst SD-WAN Manager (formerly vManage) fails to properly validate user-supplied input during a file upload process, allowing path traversal…KEVEPSS 28%analysed5.4CVE-2026-20122Cisco Catalyst SD-WAN Manager API arbitrary file overwriteThe API interface of Cisco Catalyst SD-WAN Manager mishandles uploaded files, letting an authenticated remote attacker overwrite arbitrary files on t…KEVEPSS 25%analysed

Source: NIST National Vulnerability Database (record CVE-2026-20129), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.