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CVE-2020-3967

19
FAUCET Score

CVE-2020-3967 is a heap-overflow vulnerability in the USB 2.0 controller (EHCI) affecting VMware ESXi, Workstation, and Fusion. A malicious actor with local access to a virtual machine could potentially exploit this to execute code on the hypervisor, though additional conditions are required. Rated 7.5 HIGH, exploitation requires high privileges on the VM and has high impact on confidentiality, integrity, and availability. There is no evidence of active exploitation, public exploit code, or KEV listing, with minimal community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0, < 3.10CPE matchmatch criteria
cpe:2.3:a:vmware:cloud_foundation:*:*:*:*:*:*:*:*
>= 4.0.0, < 4.0.1CPE matchmatch criteria
cpe:2.3:a:vmware:cloud_foundation:*:*:*:*:*:*:*:*
>= 11.0.0, < 11.5.5CPE matchmatch criteria
cpe:2.3:a:vmware:fusion:*:*:*:*:*:*:*:*
>= 15.0.0, < 15.5.5CPE matchmatch criteria
cpe:2.3:a:vmware:workstation:*:*:*:*:*:*:*:*
6.5CPE matchmatch criteria
cpe:2.3:o:vmware:esxi:6.5:-:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.8
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.47%
Probability of exploitation in next 30 days
EPSS Percentile
38.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0047 is in the 87th percentile among its peer group of 160 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

vmwarevendor investigatingvia nvd_reference
View patch

References

vmware.com / security/advisories/VMSA-2020-0015.html
Vendor Advisory
zerodayinitiative.com / advisories/ZDI-20-784
Third Party Advisory