How severe is CVE-2023-34048?

CVE-2023-34048 has a CVSS 3.1 base score of 9.8 (CRITICAL). EPSS estimates a 99.4% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2023-34048: VMware vCenter Server Out-of-Bounds Write

CISA Known Exploited Vulnerabilities

VMware vCenter Server Out-of-Bounds Write Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2024-01-22

Remediation due

2024-02-12

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

CISA notes
https://www.vmware.com/security/advisories/VMSA-2023-0023.html; https://nvd.nist.gov/vuln/detail/CVE-2023-34048

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.

Severity

CVSS 3.1 · CNA9.8 CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC · CISA-ADP

Exploitationactive

Automatableno

Technical impacttotal

Affected Products

Vendor	Product	Affected versions
VMware	VMware vCenter Server	8.0 to <8.0U2 7.0 to <7.0U3o
VMware	VMware Cloud Foundation (VMware vCenter Server)	5.x 4.x

References

2 Links

Other references

Record Details

Published

2023-10-25

Last updated

2025-10-21

Assigner (CNA)

vmware

Credited to

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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.