CVE-2023-34048

CriticalCVSS 9.8/10Known exploited (CISA KEV)Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-787

Affected software

Vendor	Product	Versions
VMware	VMware vCenter Server	>= 8.0, < 8.0U2; >= 7.0, < 7.0U3o
VMware	VMware Cloud Foundation (VMware vCenter Server)	5.x; 4.x
vmware	vcenter_server	>= 7.0, < 7.0U3o
vmware	vcenter_server	>= 8.0, < 8.0U2
vmware	cloud_foundation	>= 4.0, < KB88287
vmware	cloud_foundation	>= 5.0, < KB88287

References

https://www.vmware.com/security/advisories/VMSA-2023-0023.htmlVendor Advisory
https://www.vicarius.io/vsociety/posts/understanding-cve-2023-34048-a-zero-day-out-of-bound-write-in-vcenter-serverExploit, Third Party Advisory
https://www.vmware.com/security/advisories/VMSA-2023-0023.htmlVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-34048US Government Resource

Timeline

Published: Oct 25, 2023
Last modified: Jun 17, 2026
Added to CISA KEV: Jan 22, 2024
NVD status: Analyzed

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