CVE-2020-3966 json
VMware ESXi (7.0 before ESXi_7.0.0-1.20.16321839, 6.7 before ESXi670-202004101-SG and 6.5 before ESXi650-202005401-SG), Workstation (15.x b…
published 2020-06-25 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-25231
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 31%
- public exploits
- 0
- none known
Summary
VMware ESXi (7.0 before ESXi_7.0.0-1.20.16321839, 6.7 before ESXi670-202004101-SG and 6.5 before ESXi650-202005401-SG), Workstation (15.x before 15.5.2), and Fusion (11.x before 11.5.2) contain a heap-overflow due to a race condition issue in the USB 2.0 controller (EHCI). A malicious actor with local access to a virtual machine may be able to exploit this vulnerability to execute code on the hypervisor from a virtual machine. Additional conditions beyond the attacker's control must be present for exploitation to be possible.
Patch / fix
- vmware cloud_foundation 3.10, 4.0.1
- vmware fusion 11.5.2
- vmware workstation 15.5.2
Exploit prediction
0.38% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H |
| NVD | 2.0 | 3.7 | AV:L/AC:H/Au:N/C:P/I:P/A:P |
Affected products
- VMware VMware ESXi
- VMware Workstation
- VMware Fusion
Classification
- Weakness
-
- CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization
- Technology feeds
References
-
vmware.com
/security/advisories/VMSA-2020-0015.html
vendor-advisory
-
zerodayinitiative.com
/advisories/ZDI-20-783/
third-party-advisory
Sources
- CVE List CVE-2020-3966
- NVD CVE-2020-3966
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.