All KEV additions

CISA KEV digest

CISA KEV 30 Sep 2026: 1 exploited flaw in Cisco

1 vulnerability
Conceptual illustration: An enterprise router and firewall appliance, shielded network ports and a precise glowing patch plate. Headline: NETWORK SECURITY.

AI-generated illustration by CyberShitty. Not a photograph or a document from the organisations named.

On 30 September 2026, CISA added 1 actively exploited vulnerability affecting Cisco to its Known Exploited Vulnerabilities catalog. If you run any of these products, patch or mitigate now — exploitation is already happening.

CVE-2026-76504Federal deadline

In this section

Cisco Catalyst SD-WAN Manager Hex Encoding Vulnerability

Cisco / Catalyst SD-WAN Manager / CWE-177

Cisco Catalyst SD-WAN Manager contains a hex encoding vulnerability that could allow an unauthenticated, remote attacker to access an affected system with privileges of the admin user due to improper handling of URI encoding in an HTTP request.

Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.