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CVE-2026-59347 is a stack-based buffer-overflow vulnerability in the Host-Guest File System (HGFS) component of VMware Workstation and VMware Fusion. HGFS supports shared-folder access between a guest virtual machine and its host. A guest-side attacker can exploit the flaw to execute code in the host-side VMX process, enabling escape from the guest security boundary. VMware Workstation and Fusion versions 25H2 and 26H1 prior to 26H1u1 are affected.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
High-severity (CVSS 8.1) stack-based buffer-overflow VM-escape vulnerability in the Host-Guest File System (HGFS) component of VMware Workstation and Fusion. A locally administrative guest user can execute code as the host-side VMX process.
A high-severity stack-based buffer overflow that can permit a locally privileged virtual-machine user to execute code as the VMX process running on the host.
Important stack-based buffer-overflow vulnerability in VMware Host-Guest File System (HGFS) shared-folder functionality that permits a guest administrator to execute code in the host's VMX process.
A critical vulnerability affecting VMware Workstation versions 25H2 and 26H1.x before 26H1u1; the referenced CVSS v3 score is 9.8.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.