CVE-2026-47876
VMXNET3 out-of-bounds write vulnerability
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.
INFO
Published Date :
July 30, 2026, 1:16 p.m.
Last Modified :
July 30, 2026, 2:16 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-47876
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | dcf2e128-44bd-42ed-91e8-88f912c1401d | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update VMware ESX to the latest version.
- Apply security patches provided by the vendor.
- Ensure VMXNET3 adapter is configured securely.
- Restrict local administrative privileges on VMs.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-47876.
| URL | Resource |
|---|---|
| https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/38017 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-47876 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-47876
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-47876 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-47876 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 30, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-47876', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-30T13:02:22.733448Z'} -
New CVE Received by [email protected]
Jul. 30, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'VMware', 'product': 'Cloud Foundation', 'versions': [{'status': 'affected', 'version': '9.1.x.x'}, {'status': 'affected', 'version': '9.0.x.x'}, {'status': 'affected', 'version': '5.x'}], 'defaultStatus': 'unaffected'}, {'vendor': 'VMware', 'product': 'vSphere Foundation', 'versions': [{'status': 'affected', 'version': '9.1.x.x'}, {'status': 'affected', 'version': '9.0.x.x'}], 'defaultStatus': 'unaffected'}, {'vendor': 'VMware', 'product': 'ESX', 'versions': [{'status': 'affected', 'version': '9.1.x.x', 'lessThan': 'ESXi-9.1.0.0200-25557999', 'versionType': 'custom'}, {'status': 'affected', 'version': '9.0.x.x', 'lessThan': 'ESXi-9.0.2.0100-25595025', 'versionType': 'custom'}, {'status': 'affected', 'version': '8.0', 'lessThan': 'ESXi80U3k-25595708', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'VMware', 'product': 'Telco Cloud Platform', 'versions': [{'status': 'affected', 'version': '5.1.x'}, {'status': 'affected', 'version': '5.0.x'}], 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V3.1 AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-787 Added Reference https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/38017