CVE-2023-34048: VMware vCenter Server Out-of-Bounds Write Vulnerability
Vulnerability summary
CVE-2023-34048 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in VMware vCenter Server. It is known to be exploited: CISA lists it, first on 22-01-2024. EPSS estimates a 99.43% chance of exploitation in the next 30 days, higher than 99.9% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 25-10-2023PublishedVulnerability first disclosed.
- 22-01-2024Added to CISA KEVVMware vCenter Server Out-of-Bounds Write Vulnerability
- 12-02-2024CISA remediation dueApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- 21-10-2025Last modifiedVulnerability information updated.
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.
CVSS metrics
2 scores · 2 sources · 1 version- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
99.43%
Chance of exploitation in the next 30 days
Percentile
100%
Versus all other CVEs
30-day change
0.00 pp
From 99.43% on 20-09-2026
Known exploited
Compare KEV catalogs
CISA KEVListed- Added
- 22-01-2024
- Federal due date
- 12-02-2024
CISA required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. www.vmware.com/security/advisories/VMSA-2023-0023.html nvd.nist.gov/vuln/detail/CVE-2023-34048
Public exploits
1 foundExploit Reference (vicarius.io)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Vmware3 products
- vcenter_serverEOL≥ 4.0, ≤ 5.5 | 7.0 | 7.0:a | 7.0:b | 7.0:c | 7.0:d | 7.0:update1 | 7.0:update1a | 7.0:update1c | 7.0:update1d | 7.0:update2 | 7.0:update2a | 7.0:update2b | 7.0:update2c | 7.0:update2d | 7.0:update3 | 7.0:update3a | 7.0:update3c | 7.0:update3d | 7.0:update3e | 7.0:update3f | 7.0:update3g | 7.0:update3h | 7.0:update3i | 7.0:update3j | 7.0:update3k | 7.0:update3l | 7.0:update3m | 7.0:update3n | 8.0 | 8.0:a | 8.0:b | 8.0:c | 8.0:update1 | 8.0:update1a | 8.0:update1b | 8.0:update1c
- vmware cloud foundation (vmware vcenter server)≥ 5.0, < 6.0 | ≥ 4.0, < 5.0
- vmware vcenter server≥ 8.0, < 8.0U2 | ≥ 7.0, < 7.0U3o
1 vendor · 3 products
References
3 links- www.vmware.com/security/advisories/VMSA-2023-0023.htmlVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-34048Government ResourceUS Government Resource