VMware ESXi and Workstation TOCTOU Race Condition Vulnerability
VMware ESXi, and Workstation contain a TOCTOU (Time-of-Check Time-of-Use) vulnerability that leads to an out-of-bounds write. A malicious actor with local administrative privileges on a virtual machine may exploit this issue to execute code as the virtual machine's VMX process running on the host.
What happened
VMware ESXi, and Workstation contain a TOCTOU (Time-of-Check Time-of-Use) vulnerability that leads to an out-of-bounds write. A malicious actor with local administrative privileges on a virtual machine may exploit this issue to execute code as the virtual machine's VMX process running on the host.
CISA lists it as exploited, added 04 Mar 2025.
Does it affect you
Names VMware ESXi. Enter the product and version you run to place it against the affected range the vendor published.
What to do
- Follow the vendor advisory for the fixed release and any interim mitigation.
support.broadcom.com - Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
cisa.gov
CISA’s notes for this entry:
Affected, as published to NVD
- vmware-esxi
- VMware ESXi: exactly 7.0
The record
- NVD status
- Analyzed
- Published
- 04 Mar 2025, last modified 17 Jun 2026 (NVD)
- Severity
- CVSS 3.1 base score 8.2, High — computed here from the vector; NVD states 8.2.
- Vector
- CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- Weakness
- CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition (NVD; names by MITRE)
- Exploitation
- Listed in CISA’s Known Exploited Vulnerabilities catalogue since 04 Mar 2025; federal remediation due 25 Mar 2025. CISA entry
- Exploit probability
- EPSS 1.6%, 75th percentile — FIRST, scored 23 Oct 2026. FIRST EPSS
- Vendor
- VMware · ESXi and Workstation (CISA)
References on the NVD record
Sources
The verdict above is computed from the products and versions you entered and the affected ranges the vendor published to NVD. It does not inspect your environment, and this site never reports a product as unaffected: why.