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CVE-2026-20129

CRITICAL
9.8
CVSS 3.1
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. 

Metadata

CVE ID
CVE-2026-20129
State
PUBLISHED
Assigner
cisco
Reserved
2025-10-08 11:59 UTC
Published
2026-02-25 16:14 UTC
Last updated
2026-03-20 21:47 UTC
Primary CWE
CWE-287
Improper Authentication
Vendor / Product
Cisco / Cisco Catalyst SD-WAN Manager
Sources
cve.org  ·  NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
yes
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
Cisco Cisco Catalyst SD-WAN Manager — 20.1.12, 19.2.1, 18.4.4, 18.4.5 …
Weakness (CWE)
CWESourceDescription
CWE-287 cna Improper Authentication
CVSS scores (1)
ScoreSeverityVersionSourceVector
9.8 CRITICAL 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References (1)
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