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CVE-2023-34048

VMware vCenter Server Out-of-Bounds Write Vulnerability

Published: Oct 25, 2023Updated: Oct 30, 2025 Sources: CVE List NVD BDUCWE-787
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
99.2%
Top 0.1%
CISA KEV
Active Exploitation
Since Jan 22, 2024
Exploits
1 Known
Remediation
Patch Available
Am I actually vulnerable?1 Nuclei template available — see how to check your systems. How to verify

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-787

Affected Products

vcenter servervmware
SaaSSaaS Service
Cloud & SaaS / container-orchestration
VMware vCenter ServerVMware
On-prem
Cloud & SaaS / virtualization
VMware Cloud Foundation (VMware vCenter Server)VMware
On-prem
Cloud & SaaS / virtualization
VMware vCenter ServerBroadcom Inc.
On-prem
Cloud & SaaS
VMware Cloud FoundationBroadcom Inc.
SaaSSaaS Service
Cloud & SaaS / cloud-platform
vmwarecommercialUSCloud & SaaSaka vmware inc
broadcom inc.commercialUSCloud & SaaSaka vmware by broadcom

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Jan 22, 2024
Remediation due:Feb 12, 2024

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://www.vmware.com/security/advisories/VMSA-2023-0023.html
vmware.com
https://www.vicarius.io/vsociety/posts/understanding-cve-2023-34048-a-zero-day-out-of-bound-write-in-vcenter-server
vicarius.io
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-34048
cisa.gov
and 2 more references View all →

Timeline

Published
Oct 25, 2023
Added to CISA KEV
Jan 22, 2024
Last Updated
Oct 30, 2025

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