CVE-2023-34048
Critical 9.8 Exploited in the wild (KEV)
Confirmed active exploitation — CISA KEV catalog
- Name
- VMware vCenter Server Out-of-Bounds Write Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
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 (CRITICAL)
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 99% (percentile: 100) as of 2 November 2026
- CWE
- CWE-787
Affected products
vmware: vcenter server
References
- https://www.vmware.com/security/advisories/VMSA-2023-0023.html Vendor Advisory
- https://www.vmware.com/security/advisories/VMSA-2023-0023.html Vendor Advisory
- https://www.vicarius.io/vsociety/posts/understanding-cve-2023-34048-a-zero-day-… ExploitThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023… US Government Resource