CVE-2026-76460
Cisco Identity Services Engine Incorrect Use of Privileged APIs Vulnerability
Cisco Identity Services Engine
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.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 16 September 2026. US federal agencies were required to remediate it by 19 September 2026.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 0.8%, which is higher than 54.6% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Frequently asked questions
Is CVE-2026-76460 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2026-76460.
What does CVE-2026-76460 affect?
CVE-2026-76460 affects Cisco Identity Services Engine. 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.
How severe is CVE-2026-76460?
CVE-2026-76460 is rated CRITICAL with a CVSS base score of 10. EPSS puts the probability of exploitation in the next 30 days at 0.8%, higher than 54.6% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 19 September 2026.
How should organisations respond to CVE-2026-76460?
Apply the vendor patch for Cisco Identity Services Engine as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.