Critical 9.8Known exploited (CISA KEV)Published Oct 25, 2023

CVE-2023-34048VMware vCenter Server Out-of-Bounds Write Vulnerability

Updated under an hour ago (Oct 27, 2026, 10:23 AM ET)

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It affects VMware vCenter Server and 2 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Jan 22, 2024; federal agencies had to remediate by Feb 12, 2024. Treat that date as your deadline.

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Every CVE for VMware vCenter Server

Exploited in the last 30 days

vCenter Server contains an out-of-bounds write vulnerability in the implementation of the DCERPC protocol. A malicious actor with network access to vCenter Server may trigger an out-of-bounds write potentially leading to remote code execution.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-787
Known exploited: Added to CISA KEV Jan 22, 2024; federal remediation due Feb 12, 2024Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
EPSS (exploitation in the next 30 days): 99.21% (percentile 100)
Assigned by: vmware
NVD analysis: Analyzed
Record last updated: Oct 21, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

VMware VMware vCenter Server vmware:vcenter_server (from the name)	from 8.0 before 8.0U2; from 7.0 before 7.0U3o	CNA record
VMware VMware Cloud Foundation (VMware vCenter Server) vmware:cloud_foundation_vmware_vcenter_server (from the name)	5.x; 4.x	CNA record
vmware vcenter_server vmware:vcenter_server	from 7.0 before 7.0U3o	CISA ADP
vmware cloud_foundation vmware:cloud_foundation	from 4.0 before KB88287	CISA ADP
vmware vcenter_server vmware:vcenter_server	from 4.0 through 5.5; 7.0; 7.0; 7.0; 7.0; 7.0; 7.0; 7.0; and 29 more ranges	NVD

References

References

https://www.vmware.com/security/advisories/VMSA-2023-0023.html	vendor-advisory
https://www.vicarius.io/vsociety/posts/understanding-cve-2023-34048-a-zero-day-out-of-bound-write-in-vcenter-server	exploit, third-party-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-34048	us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.