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CVE-2023-34048

98
FAUCET Score

CVE-2023-34048 is a critical out-of-bounds write vulnerability in VMware vCenter Server's DCERPC protocol implementation. This flaw allows an unauthenticated attacker with network access to execute arbitrary code remotely. With a CVSS score of 9.8 (CRITICAL) and a FAUCET Risk Score of 100/100, its impact includes complete compromise of confidentiality, integrity, and availability. This vulnerability is actively exploited in the wild, as confirmed by its presence in the KEV catalog and significant media coverage, though public Metasploit or ExploitDB modules are not yet available.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.0, <= 5.5CPE matchmatch criteria
cpe:2.3:a:vmware:vcenter_server:*:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:a:vmware:vcenter_server:7.0:-:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:a:vmware:vcenter_server:7.0:a:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:a:vmware:vcenter_server:7.0:b:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:a:vmware:vcenter_server:7.0:c:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
99.43%
Probability of exploitation in next 30 days
EPSS Percentile
99.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Added to KEV · Jan 22, 2024
Nuclei: CVE-2023-34048 · Oct 17, 2025
This CVE's current EPSS score of 0.9943 is in the 100th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

vmwarevendor investigatingvia nvd_reference
View patch

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
vicarius.io / vsociety/posts/understanding-cve-2023-34048-a-zero-day-out-of-bound-write-in-vcenter-server
ExploitThird Party Advisory
vmware.com / security/advisories/VMSA-2023-0023.html
Vendor Advisory