SB20260917247 - Two command injection vulnerabilities in Cisco Identity Services Engine

Description

This security bulletin contains information about 2 vulnerabilities.

1) OS Command Injection (CVE-ID: CVE-2026-20305)

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSSv4: 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]

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 diagnostic tools 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.

2) OS Command Injection (CVE-ID: CVE-2026-20306)

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSSv4: 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]

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.

Remediation

Install update from vendor's website.

References

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-cmd-inj-e2CuZCYZ
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-cmd-inj-e2CuZCYZ