Research · Sep 16, 2026 · ZeroDay Catalog
Critical Vulnerability in Cisco Identity Services Engine API
A significant vulnerability has been identified in the Cisco Identity Services Engine, allowing potential unauthorized access via API exploitation.
What changed
A vulnerability has been discovered in the API of Cisco Identity Services Engine (ISE) that could enable unauthenticated remote attackers to bypass authentication mechanisms. This issue arises from insufficient authentication controls on a specific API endpoint, which can be exploited through crafted requests.
- The vulnerability allows unauthorized access to the affected device.
- Exploitation could lead to a complete bypass of the web-based management interface.
- This issue highlights the importance of robust authentication controls in API design.
Who is affected
Organizations utilizing Cisco Identity Services Engine are at risk due to this vulnerability. The following groups are particularly affected:
- Enterprises leveraging Cisco ISE for network access control.
- Organizations that rely on Cisco for identity management solutions.
- IT departments managing Cisco infrastructure and security protocols.
What to do
Immediate action is recommended to mitigate the risks associated with this vulnerability. Organizations should prioritize the following steps:
- Review and update Cisco Identity Services Engine to the latest version that addresses this vulnerability.
- Implement additional security measures to monitor API access and detect unauthorized attempts.
- Conduct a thorough audit of API endpoints to ensure robust authentication controls are in place.