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Vulnerability record · CVE-2020-3971 · published 25 June 2020

CVE-2020-3971: Vmware cloud foundation out-of-bounds write vulnerability

Vmware · Cloud Foundation

VMware ESXi (6.7 before ESXi670-201904101-SG and 6.5 before ESXi650-201907101-SG), Workstation (15.x before 15.0.2), and Fusion (11.x before 11.0.2) contain a heap overflow vulnerability in the vmxnet3 virtual network adapter. A malicious actor with local access to a virtual machine with a vmxnet3 network adapter present may be able to read privileged information contained in physical memory.

5.5 CVSS 3.1 Medium EPSS 0.35% · top 73.3% CWE-787 · Out-of-bounds write
5.5CVSS 3.1 base score, v2 2.1
0.35%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

VMware ESXi (6.7 before ESXi670-201904101-SG and 6.5 before ESXi650-201907101-SG), Workstation (15.x before 15.0.2), and Fusion (11.x before 11.0.2) contain a heap overflow vulnerability in the vmxnet3 virtual network adapter. A malicious actor with local access to a virtual machine with a vmxnet3 network adapter present may be able to read privileged information contained in physical memory.

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

Affected products

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

References

LinkTags
https://www.vmware.com/security/advisories/VMSA-2020-0015.html Vendor Advisory
https://www.vmware.com/security/advisories/VMSA-2020-0015.html Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-3971), CISA KEV, FIRST EPSS (scores of 2026-10-14). This page is refreshed as NVD updates the record.