CVE-2023-34048
VMware vCenter Server Out-of-Bounds Write Vulnerability
- Critical 9.8
- Exploited: added to CISA KEV 22 Jan 2024
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.
Key facts
- Published
- 25 Oct 2023
- Last changed
- 21 Oct 2025
- Assigned by
- vmware
- KEV added
- 22 Jan 2024
- KEV fix due
- 12 Feb 2024
- EPSS
- 99.234% likely to be exploited in the next 30 days, higher than 99.937% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: no; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 9.8CVSS 3.1, Criticalfrom the CNA (vmware)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What to do
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| VMware | VMware vCenter Server |
|
| VMware | VMware Cloud Foundation (VMware vCenter Server) |
|
Timeline
- 25 Oct 2023 Published
- 22 Jan 2024 CVE-2023-34048 added to CISA KEV
- 22 Jan 2024 Added to the CISA KEV catalogue