VMXNET3 out-of-bounds write vulnerability
Published Jul 30, 2026
9.3
CRITICALCVSS 3.1
EPSS 0.19%
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.
Affected products
-
- Version 5.xStatusaffectedConstraints-
- Version 9.0.x.xStatusaffectedConstraints-
- Version 9.1.x.xStatusaffectedConstraints-
- Version
-
- Version 8.0StatusaffectedConstraints<ESXi80U3k-25595708
- Version 9.0.x.xStatusaffectedConstraints<ESXi-9.0.2.0100-25595025
- Version 9.1.x.xStatusaffectedConstraints<ESXi-9.1.0.0200-25557999
- Version
-
- Version 5.0.xStatusaffectedConstraints-
- Version 5.1.xStatusaffectedConstraints-
- Version
-
- Version 9.0.x.xStatusaffectedConstraints-
- Version 9.1.x.xStatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| VMware | Cloud Foundation | unaffected |
| ||||||||||||
| VMware | ESX | unaffected |
| ||||||||||||
| VMware | Telco Cloud Platform | unaffected |
| ||||||||||||
| VMware | vSphere Foundation | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Jul 30, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Jul–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.19% (0.00192) | 7.96th | v5 (v2026.06.15) |
| Jul 31, 2026 | 0.28% (0.00281) | 20.40th | v5 (v2026.06.15) |
References (1)
Change history (0)
No recorded changes yet.