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CVE-2020-3993

21
FAUCET Score

CVE-2020-3993 is a medium-severity vulnerability affecting VMware NSX-T Data Center and Cloud Foundation versions, where a Man-in-the-Middle (MITM) attacker can compromise a KVM transport node during package download and installation from NSX Manager. The vulnerability has a CVSS score of 5.9, indicating a network-based attack with high impact on integrity, but high attack complexity and no confidentiality or availability impact. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has received some community discussion and media coverage, including a SecurityWeek article.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.5.0, < 2.5.2.2.0CPE matchmatch criteria
cpe:2.3:a:broadcom:vmware_nsx-t_data_center:*:*:*:*:*:*:*:*
>= 3.0.0, < 3.0.2CPE matchmatch criteria
cpe:2.3:a:broadcom:vmware_nsx-t_data_center:*:*:*:*:*:*:*:*
>= 3.0, < 3.10.1.1CPE matchmatch criteria
cpe:2.3:a:vmware:cloud_foundation:*:*:*:*:*:*:*:*
>= 4.0, < 4.1CPE matchmatch criteria
cpe:2.3:a:vmware:cloud_foundation:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.93%
Probability of exploitation in next 30 days
EPSS Percentile
57.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0093 is in the 15th percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

vmwarepatch availablevia nvd_reference
View patch

References

vmware.com / security/advisories/VMSA-2020-0023.html
PatchVendor Advisory