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9.8 Critical Exploited

CVE-2026-76504 Cisco Catalyst SD-WAN Manager Hex Encoding Vulnerability

Active exploitation observed

· CISA KEV catalogue
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.
Ransomware campaigns Not observed so far
Weakness CWE-177

Description

A vulnerability in the API session-based authentication management of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to access an affected system with privileges of the admin user. This vulnerability is due to improper handling of URI encoding in an HTTP request, which allows the request to bypass an authentication rule that is intended to restrict access to a specific API endpoint. An attacker could exploit this vulnerability by sending a crafted HTTP request to the API of the affected system. A successful exploit could allow the attacker to bypass authentication and gain access to the API as the admin user.

Affected products and versions

Product Affected versions Fixed in
Cisco Catalyst SD-WAN Manager 26.1 26.1.1 → 26.1.2.1.01 No fix stated
Cisco Catalyst SD-WAN Manager 26.0.1 No fix stated
Cisco Catalyst SD-WAN Manager 20.18 20.18.1 → 20.18.4.1.01 No fix stated
Cisco Catalyst SD-WAN Manager 20.16.1 No fix stated
Cisco Catalyst SD-WAN Manager 20.15 20.15.1 → 20.15.6.1.01 No fix stated
Cisco Catalyst SD-WAN Manager 20.14.1 No fix stated
Cisco Catalyst SD-WAN Manager 20.13.1 No fix stated
Cisco Catalyst SD-WAN Manager 20.12 20.12.1 → 20.12.501 No fix stated
Cisco Catalyst SD-WAN Manager 20.11 20.11.1 → 20.11.1.2 No fix stated
Show the 17 other branches
Product Affected versions Fixed in
Cisco Catalyst SD-WAN Manager 20.10 20.10.1 → 20.10.1.2 No fix stated
Cisco Catalyst SD-WAN Manager 20.9 20.9.1EFT2 → 20.9.10.1.01 No fix stated
Cisco Catalyst SD-WAN Manager 20.8.1 No fix stated
Cisco Catalyst SD-WAN Manager 20.7 20.7.1EFT2 → 20.7.2 No fix stated
Cisco Catalyst SD-WAN Manager 20.6 20.6.0.18.3 → 20.6.8 No fix stated
Cisco Catalyst SD-WAN Manager 20.5 20.5.0.1.1 → 20.5.1.2 No fix stated
Cisco Catalyst SD-WAN Manager 20.4 20.4.1 → 20.4.2.3 No fix stated
Cisco Catalyst SD-WAN Manager 20.3 20.3.1 → 20.3.814 No fix stated
Cisco Catalyst SD-WAN Manager 20.1 20.1.1 → 20.1.12 No fix stated
Cisco Catalyst SD-WAN Manager 19.3.0 No fix stated
Cisco Catalyst SD-WAN Manager 19.2 19.2.0 → 19.2.929 No fix stated
Cisco Catalyst SD-WAN Manager 19.1.0 No fix stated
Cisco Catalyst SD-WAN Manager 19.0 19.0.0 → 19.0.1a No fix stated
Cisco Catalyst SD-WAN Manager 18.4 18.4.0 → 18.4.303 No fix stated
Cisco Catalyst SD-WAN Manager 18.3 18.3.0 → 18.3.8 No fix stated
Cisco Catalyst SD-WAN Manager 18.2.0 No fix stated
Cisco Catalyst SD-WAN Manager 17.2 17.2.4 → 17.2.10 No fix stated

References

Timeline

  1. Published
  2. Added to the KEV catalogue
  3. Last modified

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