ZDI-26-188: (Pwn2Own) VMware ESXi VMCI Integer Underflow Local Privilege Escalation Vulnerability
This vulnerability allows local attackers to escalate privileges on affected installations of VMware ESXi. An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.2. The following CVEs are assigned: CVE-2025-41237.
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-26-188?
The severity of ZDI-26-188 is critical due to its potential for local privilege escalation on VMware ESXi installations.
How can I fix ZDI-26-188?
To fix ZDI-26-188, install the latest security updates and patches released by VMware for ESXi.
Who is affected by ZDI-26-188?
ZDI-26-188 affects local users who can execute high-privileged code on the target VMware ESXi guest systems.
What type of vulnerability is ZDI-26-188?
ZDI-26-188 is an integer underflow vulnerability that allows local attackers to escalate privileges.
What must an attacker achieve to exploit ZDI-26-188?
An attacker must obtain the ability to execute high-privileged code on the target guest system to exploit ZDI-26-188.