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Fencer Intel
critical 9.3

CVE-2025-41236 json

VMXNET3 integer-overflow vulnerability

published last yr. modified 4mo ago also EUVD-2025-21544

cvss
9.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.6%
EPSS 2.6% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

VMware ESXi, Workstation, and Fusion contain an integer-overflow 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.

Patch / fix

  • VMware ESXi ESXi70U3w-24784741, ESXi80U2e-24789317, ESXi80U3f-24784735
  • VMware Workstation 17.6.4

Is CVE-2025-41236 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-25-212-02 updated cvss 9.3

Rockwell Automation Lifecycle Services with VMware

  • Rockwell Automation Endpoint Protection Service with Rockwell Automation Proxy & VMware only Rockwell Automation Engineered and Integrated Solutions with VMware Rockwell Automation Industrial Data Center (IDC) with VMware >=Generations_1, <=4 Rockwell Automation Threat Detection Managed Services (TDMS) with VMware Rockwell Automation VersaVirtual Appliance (VVA) with VMware A, B
    affected: mitigation “Rockwell recommends users without Rockwell Automation managed services contract to refer to Broadcom's advisories below:” support.broadcom.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
last yr.

Exploit prediction

2.63% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 9.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

  • VMware ESXi
  • VMware Cloud Foundation
  • VMware Workstation
  • VMware Fusion
  • VMware Telco Cloud Platform
  • VMware Telco Cloud Infrastructure

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.