Is CVE-2020-3993 in the CISA KEV catalog?

No. CVE-2020-3993 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-3993?

CVE-2020-3993 has a CVSS v3 base score of 5.9 (MEDIUM).

What is the EPSS score for CVE-2020-3993?

CVE-2020-3993 has an EPSS score of 0.92% (56th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-3993?

Upgrade cloud foundation to 4.1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2020-3993

MEDIUM

5.9

CVSS v3

NVD

Description

VMware NSX-T (3.x before 3.0.2, 2.5.x before 2.5.2.2.0) contains a security vulnerability that exists in the way it allows a KVM host to download and install packages from NSX manager. A malicious actor with MITM positioning may be able to exploit this issue to compromise the transport node.

How to fix

Remediation Available

cloud foundationNVD

Affected:>= 4.0, < 4.1Fixed in:4.1CVE-2020-3993derived from NVD

vmware nsx-t data centerNVD

Affected:>= 3.0.0, < 3.0.2Fixed in:3.0.2CVE-2020-3993derived 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 VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.92%probability of exploitation in 30 days

56thpercentile

Moderate risk: more likely to be exploited than 56% of all known CVEs.

References

Patch1

vmware.com

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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 2025-08-13.