Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

CVE record · CVE-2023-34048

VMware vCenter Server Out-of-Bounds Write Vulnerability

CVSS 9.8 CriticalCriticalIn CISA KEVEPSS 0.99 · 99th percentile

Critical, because:

  • In CISA’s KEV catalogue since 22 Jan 2024: it is known to be exploited.
  • CVSS score 9.8: 9.0 or more.
  • CVSS score 9.8 (7.0 or more) and EPSS 0.99 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

How we decide what’s critical

Published by the CVE Program (CNA: vmware) at 25 Oct 2023, 04:21 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
VMware VMware vCenter Server
  • affected 8.0 to before 8.0U2 8.0U2
  • affected 7.0 to before 7.0U3o 7.0U3o
Other versions: unaffected
VMware VMware Cloud Foundation (VMware vCenter Server)
  • affected 5.x
  • affected 4.x
Other versions: unaffected
Identifiers
CVE-2023-34048
CNA
vmware
Weakness (CWE)
CWE-787
Tags
Published
25 Oct 2023
Updated
21 Oct 2025

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.8 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CNA (vmware)
  • CISA KEV Listed since 22 Jan 2024: known to be exploited.
  • EPSS 0.99, the 99th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 25 Oct 2023. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.