Cisco Catalyst SD-WAN Manager Hex Encoding Vulnerability

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• NewsExploited · CISA KEVCisco · Catalyst SD-WAN Manager

  Cisco Catalyst SD-WAN Manager Hex Encoding Vulnerability

  CVE-2026-76504

  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.

  CISA's required action · due 3 Oct 2026 for U.S. federal civilian agencies

  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.

  Cited by CISA: sec.cloudapps.cisco.com · nvd.nist.gov

  Added to KEV 30 Sep 2026 · Source checked 4 Nov 2026, 16:25 UTC · CISA KEV entry

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