CyberSecurity News

Cisco Zero-Day Highlights API Endpoint Authentication Issues

Dark Reading

· September 18, 2026

AI summary

A zero-day vulnerability in Cisco's Identity Services Engine has been identified, which is related to authentication issues with an API endpoint. The flaw, assigned CVE-2026-76460, allows for authentication bypass and has received a perfect 10 out of 10 CVSS score, indicating a high level of severity. This vulnerability affects Cisco's Identity Services Engine, a critical component of the company's security infrastructure. The high CVSS score suggests that the vulnerability could be easily exploited, posing a significant risk to affected systems. The issue is specifically related to the authentication mechanism used by the API endpoint, which can be bypassed by attackers.

Vulnerabilities mentioned

A vulnerability in an API of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to bypass authentication. This vulnerability is due to insufficient authentication control on an API endpoint. An attacker could exploit this vulnerability by sending a crafted request to an affected API endpoint. A successful exploit could allow the attacker to gain unauthorized access to the affected device by bypassing the web-based management interface.

Read the full article at Dark Readingwww.darkreading.com/vulnerabilities-threats/cisco-zero-day-api-endpoint-authentication-issues

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