Vulnerability in Cisco Catalyst Sd-Wan Manager
CVE-2026-20126
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.
EPSS: 0.003 (22.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Cisco Catalyst_sd-wan_manager — versions 20.12.6
- Cisco Catalyst Sd-wan Manager — versions 20.1.12, 19.2.1, 18.4.4
Weakness classification (CWE)
References
- psirt@cisco.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-20126?
- CVE-2026-20126 is a high-severity vulnerability in Cisco Catalyst Sd-Wan Manager, classified under CWE-648. CVSS score: 8.8/10. Published 2026-02-25.
- How severe is CVE-2026-20126?
- High severity. CVSS v3 base score is 8.8 out of 10.