VMSA-2026-0007: VMware Workstation & Fusion Hypervisor Escape & Buffer Overflow Vulnerabilities Analysis
Technical analysis of VMSA-2026-0007: guest-to-host virtual machine escape flaws (CVE-2026-59346, CVE-2026-59347) in VMware Workstation and Fusion.
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Security Roundup Series: Week of September 18, 2026 • 5 min read deep dive
Broadcom has issued security advisory VMSA-2026-0007 addressing integer overflow and heap buffer overflow vulnerabilities in VMware Workstation and Fusion (CVE-2026-59346 and CVE-2026-59347) allowing guest-to-host virtual machine escape.
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Vulnerability Intelligence:
CVE ID:
CVE-2026-59346 & CVE-2026-59347 (VMSA-2026-0007) (CWE-190 / CWE-122: Integer Overflow & Heap Buffer Overflow in Virtual Devices)
Severity: Critical (CVSS 9.3)
Status: 🚨 Virtual Machine Escape Advisory / Urgent Update
Affected Systems: VMware Workstation 17.x, VMware Fusion 13.x
Hypervisor Memory Escape Mechanics
The flaws exist in the virtual USB and SVGA device emulation controllers. Malicious code running in a guest virtual machine can trigger an integer calculation error during buffer allocation, corrupting the host VMM process and executing arbitrary code on the underlying host operating system.
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More Deep Dives from this Roundup:
CVE-2026-76460: Cisco ISE Maximum CVSS 10.0 Zero-Day Analysis
VMSA-2026-0007: VMware Workstation & Fusion Hypervisor Flaws
CVE-2026-87886: Acronis Cyber Protect Backup LPE in CISA KEV
Palo Alto GlobalProtect & Prisma Access Security Wave
Zero-Trust Defense: Securing NAC Appliances & Hypervisors
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