CVE-2026-20304
Cisco Catalyst SD-WAN Security Hardening Release - Access Control Vulnerabilities
Severity
Critical 9.9
CVSS 3.1
Exploited
Not listed
EPSS
—
Discovered by
Vendor
Published by the vendor
Published
Aug 5, 2026
Assigned by cisco
Description
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 address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20304 are related to improper access control issues that are grouped under the Common Weakness Enumeration (CWE) CWE-284.
Weakness: CWE-284
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco Catalyst SD-WAN Manager | Network & Security Management | cna-assigner |
Vendor-reported affected versions (2)
- Cisco · Cisco Catalyst SD-WAN Controller
- Cisco · Cisco Catalyst SD-WAN Manager