CVE-2020-3976

Name: CVE-2020-3976
Creator: NVD / NIST
Published: 2020-08-21T13:15:14.13+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 2.12%

Last modified Jun 17, 2026

CVE-2020-3976 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. VMware ESXi and vCenter Server contain a partial denial of service vulnerability in their respective authentication services. VMware has evaluated the severity of this issue to be in the Moderate severity range with a maximum CVSSv3 base score of 5.3.. EPSS estimates a 2.12% chance of exploitation in the next 30 days.

Description

VMware ESXi and vCenter Server contain a partial denial of service vulnerability in their respective authentication services. VMware has evaluated the severity of this issue to be in the Moderate severity range with a maximum CVSSv3 base score of 5.3.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

2.12%

79.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Vmware	Cloud Foundation	>= 3.0, < 3.10
Vmware	Cloud Foundation	>= 4.0, < 4.0.1
Vmware	Vcenter Server	6.5
Vmware	Vcenter Server	6.7
Vmware	Vcenter Server	7.0
Vmware	Esxi	6.5
Vmware	Esxi	6.7
Vmware	Esxi	7.0

References

https://www.vmware.com/security/advisories/VMSA-2020-0018.htmlPatch, Vendor Advisory
https://www.vmware.com/security/advisories/VMSA-2020-0018.htmlPatch, Vendor Advisory

Timeline

Published: Aug 21, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-3976?

How severe is CVE-2020-3976?

CVE-2020-3976 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 2.12% probability of exploitation in the next 30 days.

How do I fix CVE-2020-3976?

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-2020-3976?

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

Scan your code now

Source: NVD / NIST