Vulnerability in Cisco Catalyst Sd-wan Controller
CVE-2026-20304
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Catalyst SD-WAN engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that a…
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Cisco Catalyst Sd-wan Controller — versions 20.6.4, 20.9.2, 20.3.6
- Cisco Catalyst Sd-wan Manager — versions 20.1.12, 19.2.1, 18.4.4
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-20304?
- CVE-2026-20304 is a critical-severity vulnerability in Cisco Catalyst Sd-wan Controller, classified under Improper Access Control. CVSS score: 9.9/10. Published 2026-08-05.
- How severe is CVE-2026-20304?
- Critical severity. CVSS v3 base score is 9.9 out of 10.