vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2026-47876

VMXNET3 out-of-bounds write vulnerability

CRITICAL
9.3
CVSS Score
Published: July 30, 2026 at 12:31 PM UTC
Updated: July 30, 2026 at 06:22 PM UTC
4 products affected across 1 vendorCloud FoundationESXTelco Cloud Platform

Using Cloud Foundation by VMware?

Get instant alerts when new vulnerabilities affect Cloud Foundation - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
CRITICAL9.3
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Cloud Foundation· VMware
60%
5.x9.0.x.x9.1.x.x
ESX· VMware
60%
8.0 ≤ v < ESXi80U3k-255957089.0.x.x ≤ v < ESXi-9.0.2.0100-255950259.1.x.x ≤ v < ESXi-9.1.0.0200-255579998.09.0.x.x9.1.x.x
Affected range stops below ESXi-9.0.2.0100-25595025, so it looks safe — our inference, not a vendor statement
Affected range stops below ESXi-9.1.0.0200-25557999, so it looks safe — our inference, not a vendor statement
Affected range stops below ESXi80U3k-25595708, so it looks safe — our inference, not a vendor statement
Telco Cloud Platform· VMware
60%
5.0.x5.1.x
vSphere Foundation· VMware
60%
9.0.x.x9.1.x.x

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/38017

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.3CRITICALvmware
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-787

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card