CVE-2023-34048VMware vCenter Server Out-of-Bounds Write Vulnerability
Updated under an hour ago ()
Does this affect you?
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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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)
- 99.43% (percentile 100)
- Assigned by
- vmware
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
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
- 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.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-34048us-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.