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TI-2026-68950 Aliases CVE-2026-59346GHSA-88p7-h25r-m6vw

Integer overflow in VMware Workstation and Fusion VMXNET3 adapter

Priority MEDIUM 42CWE-190Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-190 and the CVSS impact.

Summary

VMware Workstation and Fusion versions 25H2 through 26H1 contain an integer overflow (CWE-190) in the VMXNET3 virtual network adapter. A local attacker with administrative privileges inside a virtual machine that uses the VMXNET3 adapter can execute code on the host.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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)

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00408 35th percentileScored 2026-11-07
Fix Fixed VMware Workstation (VMware): 26H1u1VMware Fusion (VMware): 26H1u1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
VMwareVMware Workstation25H2 – 26H126H1u1Patch availableCNA
VMwareVMware Fusion25H2 – 26H126H1u1Patch availableCNA
  • VMware Workstation VendorVMware Affected 25H2 – 26H1 Fixed in 26H1u1 Patch available CNA
  • VMware Fusion VendorVMware Affected 25H2 – 26H1 Fixed in 26H1u1 Patch available CNA

Remediation

Upgrade VMware Workstation and VMware Fusion to version 26H1u1, which is the fixed version listed for both products.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA VMware Workstation (VMware) Fixed in 26H1u1
  • Fix · CNA VMware Fusion (VMware) Fixed in 26H1u1

Timeline

  1. 2026-10-07 Threatist record created from CVE-2026-59346
  2. 2026-10-07 Alias added: GHSA-88p7-h25r-m6vw
  3. 2026-10-07 CISA SSVC decision points changed
  4. 2026-10-07 Priority changed: MEDIUM → LOW
  5. 2026-10-07 Priority changed: LOW → MEDIUM

References

Other 1

  • TI-2026-42442 vCenter directory-traversal vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-26040 Privilege escalation in VMware vCenter Server KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-26039 Heap-overflow in VMware vCenter Server KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-24610 Out-of-bounds write in VMware vCenter Server KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-16914 VMware vCenter Server Out-of-Bounds Write Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-07303 Command injection in Aria Operations for Networks KEVCVSS 3.1CRITICAL 9.8
See all 1181 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences