CVE-2020-3963

Name: CVE-2020-3963
Creator: NVD / NIST
Published: 2020-06-25T15:15:11.053+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.55%

Last modified Jun 17, 2026

CVE-2020-3963 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. VMware ESXi (7.0 before ESXi_7.0.0-1.20.16321839, 6.7 before ESXi670-202006401-SG and 6.5 before ESXi650-202005401-SG), Workstation (15.x before 15.5.2), and Fusion (11.x before 11.5.2) contain a use-after-free vulnerability in PVNVRAM. A malicious actor with local access to a virtual machine may be able to read privileged information contained in physical memory.. EPSS estimates a 0.55% chance of exploitation in the next 30 days.

Description

VMware ESXi (7.0 before ESXi_7.0.0-1.20.16321839, 6.7 before ESXi670-202006401-SG and 6.5 before ESXi650-202005401-SG), Workstation (15.x before 15.5.2), and Fusion (11.x before 11.5.2) contain a use-after-free vulnerability in PVNVRAM. A malicious actor with local access to a virtual machine may be able to read privileged information contained in physical memory.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.55%

41.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Vmware	Cloud Foundation	>= 3.0, < 3.10
Vmware	Cloud Foundation	>= 4.0.0, < 4.0.1
Vmware	Fusion	>= 11.0.0, < 11.5.2
Vmware	Workstation	>= 15.0.0, < 15.5.2
Vmware	Esxi	6.5
Vmware	Esxi	6.7
Vmware	Esxi	7.0.0

References

http://packetstormsecurity.com/files/158459/VMware-ESXi-Use-After-Free-Out-Of-Bounds-Access.htmlExploit, Third Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2020/Jul/22Exploit, Mailing List, Third Party Advisory
https://www.vmware.com/security/advisories/VMSA-2020-0015.htmlVendor Advisory
http://packetstormsecurity.com/files/158459/VMware-ESXi-Use-After-Free-Out-Of-Bounds-Access.htmlExploit, Third Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2020/Jul/22Exploit, Mailing List, Third Party Advisory
https://www.vmware.com/security/advisories/VMSA-2020-0015.htmlVendor Advisory

Timeline

Published: Jun 25, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-3963?

How severe is CVE-2020-3963?

CVE-2020-3963 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.55% probability of exploitation in the next 30 days.

How do I fix CVE-2020-3963?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-3963?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST