Vulnerability Intelligence Report
VMware Workstation and Fusion VMXNET3 integer-overflow vulnerability
CVE-2026-59346
VMware Workstation and Fusion contain an integer-overflow vulnerability. 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. Affected versions: - VMware Workstation: 25H2, 26H1 (fixed in 26H1u1) - VMware Fusion: 25H2, 26H1 (fixed in 26H1u1)
No Active Exploit Signals
CVSS Base Score
9.3
CRITICAL
Exploitability:2.6
Impact Score:6.1
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
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SSVC Action
—
Weaknesses (CWE)
CWE-190 ↗CWE-190 Integer Overflow or Wraparound
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| VMware | VMware Workstation | 25H2 <= 26H1 (affected), 26H1u1 (unaffected) |
| VMware | VMware Fusion | 25H2 <= 26H1 (affected), 26H1u1 (unaffected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | VMware by Broadcom · Vendor · USA |
| Reserved | 2026-07-04T18:14:34 |
| Published | 2026-10-07T05:40:03 |
| Last Updated | 2026-10-07T11:29:55 |
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