CVE-2026-20304 Cisco Catalyst SD-WAN Security Hardening Release - Access Control Vulnerabilities
Improper access control in Cisco Catalyst SD-WAN allows attackers to bypass security restrictions, requiring a software hardening patch.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-20304?
CVE-2026-20304 is a critical missing authorization vulnerability in Cisco Catalyst SD-WAN Controller, published on 5 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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
Which versions are affected by CVE-2026-20304?
How do I fix CVE-2026-20304?
No fix has been published for CVE-2026-20304 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-20304 being exploited?
There is no known exploitation of CVE-2026-20304 in the wild and no public exploit code.
Sources
Also known as GHSA-pqwq-qr78-m9wc.