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.
Published: 2026-09-30
Score: 9.8 Critical
EPSS: n/a
KEV: Yes
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 30 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Cisco
Cisco catalyst Sd-wan Manager
Vendors & Products Cisco
Cisco catalyst Sd-wan Manager

Wed, 30 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
References
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Wed, 30 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics kev

{'dateAdded': '2026-09-30T00:00:00+00:00', 'dueDate': '2026-10-03T00:00:00+00:00'}

Wed, 30 Sep 2026 13:15:00 +0000

Type Values Removed Values Added
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.
Title Cisco Catalyst SD-WAN Manager System Account Authorization Bypass Vulnerability
Weaknesses CWE-177
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Subscriptions

Cisco Catalyst Sd-wan Manager
cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-09-30T19:58:23.436Z

Reserved: 2026-08-19T12:02:03.641Z

Link: CVE-2026-76504

cve-icon Vulnrichment

Updated: 2026-09-30T13:39:20.192Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-09-30T13:17:20.247

Modified: 2026-09-30T19:02:05.223

Link: CVE-2026-76504

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-30T20:30:18Z

Weaknesses
  • CWE-177

    Improper Handling of URL Encoding (Hex Encoding)