Unrated severityNVD Advisory· Published Feb 25, 2026· Updated Mar 20, 2026
Cisco Catayst SD-WAN Authentication Bypass Vulnerability
CVE-2026-20129
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.
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Affected products
2<20.18+ 1 more
- (no CPE)range: <20.18
- (no CPE)range: 20.1.12
Patches
Vulnerability mechanics
References
1News mentions
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