Cisco Identity Services Engine invokeScript Command Injection Remote Code Execution Vulnerability

August 13th, 2026
ZDI-26-581 ZDI-CAN-28709

CVE ID

CVE-2026-20147

CVSS Score

7.2 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

Cisco

Affected Products

Identity Services Engine

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Cisco Identity Services Engine. Authentication is required to exploit this vulnerability.

The specific flaw exists within the implementation of the invokeScript method. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of the iseadminportal user.

Additional Details

Cisco has issued an update to correct this vulnerability. More details can be found at:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-rce-traversal-8bYndVrZ

Disclosure Timeline

  • 2025-12-18 - Vulnerability reported to vendor
  • 2026-08-13 - Coordinated public release of advisory
  • 2026-08-13 - Advisory Updated

Credit

Jonathan Lein of Trend Research

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