CVE-2023-34048
CriticalExploitedPublic exploitvCenter Server contains an out-of-bounds write vulnerability in the implementation of the DCERPC protocol.
Published Oct 25, 2023 · Updated Oct 21, 2025 · Also known as TR-23-0601
Key Facts
Patch immediately- CVE-2023-34048 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Vcenter Server (Vmware), VMware Cloud Foundation (VMware vCenter Server).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jan 17, 2024. Public exploit code is available.
- EPSS estimates a 99% probability of exploitation in the next 30 days.
- Fixed versions are available, including Vcenter Server <=5.5, Vcenter Server 7.0U3o, Vcenter Server 8.0U2.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
99%
Higher than 99.9% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2023-34048 brief as a PDF
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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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Jan 22, 2024 | Feb 12, 2024 | Not reported |
| Industry KEV feed | Jan 17, 2024 | Feb 12, 2024 | Not reported |
| CIRCL KEV | Jan 22, 2024 | Feb 12, 2024 | Not reported |
| ENISA EUVD | Jan 22, 2024 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Affected Products
39 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Vcenter ServerVmware | 7.0, 7.0-a, 7.0-b, 7.0-c, 7.0-d, 7.0-update1, 7.0-update1a, 7.0-update1c | 5.5 |
| VMware Cloud Foundation (VMware vCenter Server) | >= 5.x | n/a |
Patched Releases
Vcenter Server
<=5.5, 7.0U3o, 8.0U2
Timeline
Publicly disclosed
Oct 25, 2023
Added to Industry KEV feed
Jan 17, 2024
Added to CISA KEV
Jan 22, 2024
Added to CIRCL KEV
Jan 22, 2024
Added to ENISA EUVD
Jan 22, 2024
Last updated
Oct 21, 2025
Weakness Type
- CWE-787 Out-of-bounds Write
References
- advisoryUSOM advisory
- advisoryVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
vCenter Server contains an out-of-bounds write vulnerability in the implementation of the DCERPC protocol.
Affected: Vcenter Server (Vmware) versions 7.0, 7.0-a, 7.0-b, 7.0-c, 7.0-d, 7.0-update1, 7.0-update1a, 7.0-update1c; VMware Cloud Foundation (VMware vCenter Server) versions >= 5.x. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jan 17, 2024.
Yes. It was added on Jan 22, 2024 with a federal remediation due date of Feb 12, 2024.
Public exploit code is available.
Fixed versions are available, including Vcenter Server <=5.5, Vcenter Server 7.0U3o, Vcenter Server 8.0U2.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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