CVE-2026-20129

Critical

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. 

SeverityCritical
CVSS9.8
Exploit probability—
ProductCisco Catalyst Sd-wan Manager
PublishedFeb 25, 2026
First seenFeb 25, 2026

How to fix

Update
  • cisco catalyst_sd-wan_manager20.9.8.2, 20.12.5.3, 20.15.4.2, 20.18 or later

Affected products

ProductAffected versionsFixed in
cisco catalyst_sd-wan_managerv < 20.9.8.2, 20.11 ≤ v < 20.12.5.3, 20.13 ≤ v < 20.15.4.2, 20.16 ≤ v < 20.18, 20.12.620.9.8.2, 20.12.5.3, 20.15.4.2, 20.18

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CVE-2026-20129 · Cisco Catalyst Sd-wan Manager · Dark Radar