CVE-2026-47876
VMXNET3 out-of-bounds write vulnerability
At a glance
- Severity
- CRITICAL 9.3
- EPSS
- EPSS 0.19 % · percentile 9 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- vmware
- NVD status
- Awaiting Analysis
Description
VMware ESX contains an out-of-bounds write vulnerability in the VMXNET3 virtual network adapter. A malicious actor with local administrative privileges on a virtual machine with VMXNET3 virtual network adapter may exploit this issue to execute code on the host. Non VMXNET3 virtual adapters are not affected by this issue.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | CRITICAL 9.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H | vmware |
| CVSS 3.1 | CRITICAL 9.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H | NVD · security@vmware.com (Secondary) |
Weaknesses (CWE)
European references
- ENISA EUVD · EUVD-2026-51105
- GCVE · GCVE-0-2026-47876
CERT-FR advisories
- CERTFR-2026-AVI-0949 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| VMware · Cloud Foundation | affected 9.1.x.x ; affected 9.0.x.x ; affected 5.x |
| VMware · vSphere Foundation | affected 9.1.x.x ; affected 9.0.x.x |
| VMware · ESX | affected 9.1.x.x < ESXi-9.1.0.0200-25557999 ; affected 9.0.x.x < ESXi-9.0.2.0100-25595025 ; affected 8.0 < ESXi80U3k-25595708 |
| VMware · Telco Cloud Platform | affected 5.1.x ; affected 5.0.x |
References
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |