CISCO Security Advisory
Published Date: July 1, 2026
CVE: CVE-2026-20191
Advisory Summary
A serious security flaw has been identified in Cisco Catalyst Center that permits an unauthenticated, remote attacker to read arbitrary files within a restricted container on the affected devices. This vulnerability arises from inadequate validation of user-supplied inputs, which can be exploited by sending a specially crafted HTTP request.
The impact of exploiting this vulnerability is rated High, as it could lead to unauthorized access to sensitive configuration or operational data housed inside the Cisco Catalyst Center. Unfortunately, no workarounds exist for this issue, emphasizing the necessity for immediate action.
Cisco has already released security patches that effectively remediate this vulnerability (CVE-2026-20191). It is critical for IT security teams managing Cisco Catalyst infrastructure to prioritize deploying these updates to safeguard their environments against potential breaches.
- Identify all deployed instances of Cisco Catalyst Center in your network.
- Apply the official software updates promptly as detailed in Cisco’s advisory.
- Monitor network traffic for unusual HTTP requests that might indicate attempts to exploit this vulnerability.
Maintaining updated Cisco Catalyst Center installations is essential to preserve the integrity and confidentiality of your network management operations.
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-2026-20191
Reference: Vendor Advisory