CVE-2026-76504: Cisco Catalyst SD-WAN Manager Hex Encoding Vulnerability
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.
- Published by source
- 2026-09-30
- First seen by Reality Radar
- 2026-10-20
- Last verified
- 2026-10-20
Affected
- Manufacturer
- Cisco
- Products
- Catalyst SD-WAN Manager Cisco Catalyst SD-WAN Manager
Whether your exact unit is affected depends on the model, serial number and region in the official notice.
What the official notice says
Risk: Actively exploited in the wild
Remedy / actions:
- 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.
Is this affecting you?
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Sources
- CISA Known Exploited Vulnerabilities Tier A · official published 2026-09-30
Evidence ledger
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