Input validation error in Cisco Identity Services Engine (ISE) - CVE-2026-20237
Published: September 17, 2026
Vulnerability identifier: #VU150708
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-20237
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise confidentiality, integrity, and availability.
The vulnerability exists due to improper input validation in Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) when processing input. A remote attacker can exploit the vulnerability to compromise confidentiality, integrity, and availability.
Affected software
Cisco Identity Services Engine (ISE)
How to mitigate CVE-2026-20237
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