CVE-2023-34048
ENISA EUVD: EUVD-2023-38166 ↗
Exploited in the Wild
✓ Confirmed 0-Day
Triaged: March 5, 2026
7 articles
Published: 2023-10-25
EPSS Score
Source: FIRST.org · 2026-05-23
93.21%
probability
This CVE has a 93.21% probability
of being exploited in the next 30 days.
0%
Top 99.8th percentile of all CVEs
100%
CVSS v3.1
Source: VulnerabilityLookup (CIRCL)9.8
CRITICAL
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description
VulnerabilityLookup (CNA)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.
Affected Products
VMware
VMware vCenter Server
8.0
7.0
VMware
VMware Cloud Foundation (VMware vCenter Server)
5.x
4.x
Attack Intelligence
Signal Intelligence
Confidence
92%
EPSS
93.21%
CVSS v3.1
9.8
Mentions
7
Last Seen
May 08, 2025
CNA Information
CNA Assigner
vmware
CNA Title
VMware vCenter Server Out-of-Bounds Write Vulnerability
Analyst Note
CVE-2023-34048 is explicitly named as a zero-day exploited in attacks by Broadcom's October 2023 security advisory. Article [1] directly states 'Broadcom fixes three VMware zero-days exploited in attacks,' and article [2] confirms Chinese hackers exploited this vulnerability as a zero-day for two years prior to the October 2023 patch, establishing clear in-the-wild exploitation before patch availability.
Threat Actors 11
APT 41
apt_group
Information theft and espionage
🇨🇳 CN
APT 28
apt_group
Information theft and espionage
🇷🇺 RU
CHRYSENE
apt_group
Information theft and espionage
🇮🇷 IR
Harvester
apt_group
Information theft and espionage
Unknown
Hacking Team
apt_group
🇮🇹 IT
Infy
apt_group
Information theft and espionage
🇮🇷 IR
GhostSec
apt_group
UNC3886
apt_group
Information theft and espionage
🇨🇳 CN
APT 22
apt_group
Information theft and espionage
🇨🇳 CN
Markopolo
apt_group
🇷🇺 RU
Big Panda
apt_group
🇨🇳 CN
Triage Info
Decided atMar 05, 2026
Published DateOct 25, 2023