CVE-2026-20304

CriticalCVSS 9.9/10Last modified Oct 23, 2026

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.

Metrics

CVSS 3.1 9.9/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-284

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
Cisco	Cisco Catalyst SD-WAN Controller	20.6.4; 20.9.2; 20.3.6; 20.7.2; 20.7.1; 20.5.1; 20.6.2; 19.3.0; 20.6.1; 17.2.4; 18.2.0; 18.4.6; 19.1.0; 19.2.4; 19.2.929; 18.3.8; 18.4.303; 18.3.7; 18.4.1; 19.2.097
Cisco	Cisco Catalyst SD-WAN Manager	20.1.12; 19.2.1; 18.4.4; 18.4.5; 20.1.1.1; 20.1.1; 19.3.0; 19.2.2; 19.2.099; 18.3.6; 18.3.7; 19.2.0; 18.3.8; 19.0.0; 19.1.0; 18.4.302; 18.4.303; 19.2.097; 19.2.098; 17.2.10

References

Timeline

Published: Aug 5, 2026
Last modified: Oct 23, 2026
NVD status: Awaiting Analysis

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