What is CVE-2023-34056?

CVE-2023-34056 is a medium-severity vulnerability in VMware Vcenter Server, classified under CWE-922. CVSS score: 4.3/10. Published 2023-10-25.

How severe is CVE-2023-34056?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in VMware Vcenter Server

CVE-2023-34056

vCenter Server contains a partial information disclosure vulnerability. A malicious actor with non-administrative privileges to vCenter Server may leverage this issue to access unauthorized data.

Published 2023-10-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.007 (49.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

VMware Vcenter Server — versions 7.0, 8.0
VMware Cloud Foundation (VMware Vcenter Server) — versions 5.x, 4.x
VMware Vcenter Server — versions 8.0, 7.0

Weakness classification (CWE)

CWE-922

References

www.vmware.com/security/advisories/VMSA-2023-0023.html (Vendor Advisory)

Frequently asked questions

What is CVE-2023-34056?: CVE-2023-34056 is a medium-severity vulnerability in VMware Vcenter Server, classified under CWE-922. CVSS score: 4.3/10. Published 2023-10-25.
How severe is CVE-2023-34056?: Medium severity. CVSS v3 base score is 4.3 out of 10.