Cisco Catalyst SD-WAN Manager System Account Authorization Bypass Vulnerability
Published Sep 30, 2026 ·Due Oct 3, 2026
9.8
CRITICALCVSS 3.1
EPSS 1.10%
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
-
- Version 17.2.10StatusaffectedConstraints-
- Version 17.2.4StatusaffectedConstraints-
- Version 17.2.5StatusaffectedConstraints-
- Version 17.2.6StatusaffectedConstraints-
- Version 17.2.7StatusaffectedConstraints-
- Version 17.2.8StatusaffectedConstraints-
- Version 17.2.9StatusaffectedConstraints-
- Version 18.2.0StatusaffectedConstraints-
- Version 18.3.0StatusaffectedConstraints-
- Version 18.3.1StatusaffectedConstraints-
- Version 18.3.1.1StatusaffectedConstraints-
- Version 18.3.3StatusaffectedConstraints-
- Version 18.3.3.1StatusaffectedConstraints-
- Version 18.3.4StatusaffectedConstraints-
- Version 18.3.5StatusaffectedConstraints-
- Version 18.3.6StatusaffectedConstraints-
- Version 18.3.6.1StatusaffectedConstraints-
- Version 18.3.7StatusaffectedConstraints-
- Version 18.3.8StatusaffectedConstraints-
- Version 18.4.0StatusaffectedConstraints-
- Version 18.4.0.1StatusaffectedConstraints-
- Version 18.4.1StatusaffectedConstraints-
- Version 18.4.3StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco Catalyst SD-WAN Manager | n/a |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
Date Added
Sep 30, 2026
Patch Due
Oct 3, 2026
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.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
ActiveAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed Sep 30, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Not enough EPSS history yet for a chart. At least two recorded scores are needed.
Percentile over time
Not enough EPSS history yet for a chart. At least two recorded scores are needed.
References (2)
Change history (0)
No recorded changes yet.