What is CVE-2023-20870?

CVE-2023-20870 is a medium-severity vulnerability in VMware Fusion, classified under Out-of-bounds Read. CVSS score: 6.0/10. Published 2023-04-25.

How severe is CVE-2023-20870?

Medium severity. CVSS v3 base score is 6.0 out of 10.

Out-of-bounds Read in VMware Fusion

CVE-2023-20870

VMware Workstation and Fusion contain an out-of-bounds read vulnerability that exists in the functionality for sharing host Bluetooth devices with the virtual machine.

Vulnerability class: Buffer Overflow

Published 2023-04-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (28.9th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 28.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

VMware Fusion
VMware Workstation
VMware Workstation Pro / Player (Workstation) And Fusion — versions VMware Workstation (17.x) and VMware Fusion (13.x)

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

www.vmware.com/security/advisories/VMSA-2023-0008.html (Vendor Advisory)

Frequently asked questions

What is CVE-2023-20870?: CVE-2023-20870 is a medium-severity vulnerability in VMware Fusion, classified under Out-of-bounds Read. CVSS score: 6.0/10. Published 2023-04-25.
How severe is CVE-2023-20870?: Medium severity. CVSS v3 base score is 6.0 out of 10.