Is CVE-2020-3971 in the CISA KEV catalog?

No. CVE-2020-3971 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-3971?

CVE-2020-3971 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2020-3971?

CVE-2020-3971 has an EPSS score of 0.33% (25th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-3971?

Upgrade cloud foundation to 3.7.2 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2020-3971

MEDIUM

5.5

CVSS v3

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.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

cloud foundationNVD

Affected:>= 3.0, < 3.7.2Fixed in:3.7.2CVE-2020-3971derived from NVD

fusionNVD

Affected:>= 11.0.0, < 11.0.2Fixed in:11.0.2CVE-2020-3971derived from NVD

workstationNVD

Affected:>= 15.0.0, < 15.0.2Fixed in:15.0.2CVE-2020-3971derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.33%probability of exploitation in 30 days

25thpercentile

Low risk: more likely to be exploited than 25% of all known CVEs.

References

Vendor Advisory1

vmware.com

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.