ZDI-CAN-31320: 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 authenticate to the affected Cisco Identity Services Engine installation. The provided information does not specify what type or privilege level of authenticated account is required.
2
What is the potential impact if exploitation succeeds?
A successful attacker can execute arbitrary code on the affected installation. The advisory assigns this issue CVSS 7.2.