CVE-2026-59346: CWE-190 Integer Overflow or Wraparound in VMware VMware Workstation
Description
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)
CVSS v3.1
Score 9.3critical
Affected software
VMware
VMware Workstation
VMware
VMware Fusion
pkg:github/vmware/workstationRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an integer overflow or wraparound (CWE-190) in VMware Workstation and Fusion products. It affects versions 25H2 through 26H1 and can be exploited by a malicious actor who has local administrative privileges on a virtual machine configured with the VMXNET3 virtual network adapter. Successful exploitation allows code execution on the host system, posing a critical security risk. The issue is addressed by VMware in version 26H1u1.
Potential Impact
Exploitation of this vulnerability allows an attacker with local administrative access on a guest VM to execute arbitrary code on the host machine, potentially compromising the host's confidentiality, integrity, and availability. This elevates the attacker's privileges from guest to host level, which is a significant security breach.
Mitigation Recommendations
VMware has released an official fix in version 26H1u1 for both VMware Workstation and Fusion. Users should upgrade affected installations to version 26H1u1 or later to remediate this vulnerability. No other mitigation or workaround is indicated in the available data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- vmware
- Date Reserved
- 2026-07-04T18:14:34.673Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ac5e0dc2cdf04f6561c056c
Added to database: 10/07/2026, 06:04:12 UTC
Last enriched: 10/07/2026, 06:18:17 UTC
Last updated: 10/07/2026, 18:56:12 UTC
Views: 21
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