Summary
generated automatically from NVD dataCisco Catalyst SD-WAN Manager contains an authentication bypass in its API session-based authentication management (CWE-177). Because URI encoding in HTTP requests is handled improperly, a crafted request can evade the rule meant to restrict a specific API endpoint, letting an unauthenticated remote attacker access the API with admin user privileges. The flaw is rated CRITICAL (CVSS v3.1 score 9.8) and is listed in the CISA KEV catalog, which indicates active exploitation.
NVD 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.
⚠️ Actively exploited — CISA KEV
This CVE was added to CISA's Known Exploited Vulnerabilities catalog on 2026-09-30. It is confirmed exploited in the wild and must be patched as a priority.
Remediation deadline (US federal agencies): 2026-10-03
EPSS · FIRST.org
1.8%probability of exploitation in the next 30 days
Higher than 78% of scored CVEs
EPSS (Exploit Prediction Scoring System) estimates, from observed exploitation activity, how likely a CVE is to be exploited in the next 30 days. It complements CVSS, which measures severity, not likelihood. Score of 2026-10-16, recomputed daily by FIRST.org.
In-depth analysis on cveo.tech
We've published a detailed analysis of this CVE — exploitation, IOCs and mitigation.
CVSS v3.1 Score
Information
- Published
- 30 sept. 2026
- Updated
- 3 oct. 2026
- Status
- Analyzed
- Source
- psirt@cisco.com
Affected products
Weaknesses (CWE)
References (2)
Similar CVEs
Other vulnerabilities of type CWE-177
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