Zero-day vulnerability in VMware ESXi

Out-of-bounds read
CVE-2025-22226

Vulnerability details

Advisory: SB2025030423 - Multiple vulnerabilities in VMware ESXi

Vulnerable component: VMware ESXi

CVE-ID: CVE-2025-22226

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N/E:H/RL:O/RC:C

CWE-ID: CWE-125 - Out-of-bounds read

Description:

The vulnerability allows a malicious guest to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in HGFS. A malicious guest can trigger an out-of-bounds read error and read contents of memory on the system.

Note, the vulnerability is being actively exploited in the wild.

External links:

https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/25390

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.