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Vulnerability record · CVE-2026-20126 · published 25 February 2026

CVE-2026-20126: Cisco catalyst sd-wan manager vulnerability

Cisco · Catalyst Sd Wan Manager

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.

7.8 CVSS 3.1 High EPSS 0.31% · top 79.1% CWE-648 · CWE-648
7.8CVSS 3.1 base score
0.31%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 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.

CVSS:3.1/AV:L/AC:L/PR:L/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-2026-20126), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.