ZDI-26-717: Cisco Identity Services Engine AlarmMessageDiskQueue Deserialization of Untrusted Data Remote Code Execution Vulnerability
Published Sep 18, 2026
·Updated
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 ZDI has assigned a CVSS rating of 7.2. The following CVEs are assigned: CVE-2026-20211.
Affected Software
1 affected component
Cisco Identity Services Engine
Event History
Sep 18, 2026
Advisory Published
via ZDI·05:00 AM
Data Sourced
via ZDI·05:00 AM
Description
Frequently Asked Questions
1
What level of access does an attacker need to exploit this issue?
The attacker must be authenticated to the affected Cisco Identity Services Engine installation. The provided information does not specify what authenticated role or privilege level is required.
2
What is the potential impact of successful exploitation?
A successful attacker can execute arbitrary code on the affected Cisco Identity Services Engine installation.
3
Which identifier should be used to track this vulnerability?
This issue is assigned CVE-2026-20211 and is also tracked as ZDI-26-717.