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Vulnerability record · CVE-2017-4933 · published 20 December 2017

CVE-2017-4933: Vmware workstation pro out-of-bounds write vulnerability

Vmware · Workstation Pro

VMware ESXi (6.5 before ESXi650-201710401-BG), Workstation (12.x before 12.5.8), and Fusion (8.x before 8.5.9) contain a vulnerability that could allow an authenticated VNC session to cause a heap overflow via a specific set of VNC packets resulting in heap corruption. Successful exploitation of this issue could result in remote code execution in a virtual machine via the authenticated VNC session. Note: In order for exploitation to be possible in ESXi, VNC must be manually enabled in a virtual machine's .vmx configuration file. In addition, ESXi must be configured to allow VNC traffic through the built-in firewall.

8.8 CVSS 3.1 High EPSS 3.6% · top 11.1% CWE-787 · Out-of-bounds write
8.8CVSS 3.1 base score, v2 6.0
3.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

VMware ESXi (6.5 before ESXi650-201710401-BG), Workstation (12.x before 12.5.8), and Fusion (8.x before 8.5.9) contain a vulnerability that could allow an authenticated VNC session to cause a heap overflow via a specific set of VNC packets resulting in heap corruption. Successful exploitation of this issue could result in remote code execution in a virtual machine via the authenticated VNC session. Note: In order for exploitation to be possible in ESXi, VNC must be manually enabled in a virtual machine's .vmx configuration file. In addition, ESXi must be configured to allow VNC traffic through the built-in firewall.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securitytracker.com/id/1040024 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1040025 Third Party AdvisoryVDB Entry
https://www.vmware.com/security/advisories/VMSA-2017-0021.html Issue TrackingVendor Advisory
http://www.securitytracker.com/id/1040024 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1040025 Third Party AdvisoryVDB Entry
https://www.vmware.com/security/advisories/VMSA-2017-0021.html Issue TrackingVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2017-4933), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.