CVE-2026-20180
Cisco · Identity Services Engine (ISE)
A command injection vulnerability in Cisco Identity Services Engine allows authenticated remote attackers to execute arbitrary OS commands and potentially gain root privileges.
Executive summary
An authenticated remote command execution vulnerability in Cisco Identity Services Engine (ISE) poses a critical risk to network infrastructure and system availability.
Vulnerability
This vulnerability is caused by insufficient validation of user-supplied input, allowing an authenticated attacker (Read Only Admin level or higher) to execute arbitrary commands on the underlying operating system. Exploitation can result in root-level privilege escalation or a denial-of-service condition affecting network authentication.
Business impact
The impact of this vulnerability is severe, as it allows attackers to move from an authenticated administrative state to full system control. With a CVSS score of 9.9, this vulnerability threatens the integrity and availability of the entire network identity infrastructure, potentially resulting in widespread service outages and unauthorized access to sensitive internal network segments.
Remediation
Immediate Action: Update Cisco Identity Services Engine to the latest version as specified in the official vendor security advisory.
Proactive Monitoring: Monitor system logs for unexpected process execution and verify that administrative access is restricted to authorized personnel only.
Compensating Controls: Implement strict firewall rules to limit access to the ISE management interface to essential administrative workstations only.
Exploitation status
Public Exploit Available: Not specified
Analyst recommendation
Due to the extreme risk posed by command injection in a centralized security appliance like Cisco ISE, organizations must treat this as a high-priority update. Administrators should verify their current version against the vendor's updated release and perform the upgrade as soon as possible to mitigate the risk of privilege escalation and DoS.