OS Command Injection in Cisco Identity Services Engine (ISE) - CVE-2026-20306
Published: September 17, 2026
Vulnerability identifier: #VU150733
CSH Severity: Low
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-20306
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary code as the root user.
The vulnerability exists due to improper validation of user-supplied input in the REST API of Cisco ISE and ISE-PIC when handling crafted commands sent to the web-based management interface. A remote privileged user can send crafted commands to the web-based management interface to execute arbitrary code as the root user.
Affected software
Cisco Identity Services Engine (ISE)
How to mitigate CVE-2026-20306
Install security update from vendor's website.
Cisco Identity Services Engine (ISE) - addressed in versions 3.1 Patch 12, 3.2 Patch 11, 3.3 Patch 12, 3.4 Patch 7, 3.5 Patch 4