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Vulnerabilities

Vulnerability · CVE-2023-34048

VMware vCenter Server Out-of-Bounds Write Vulnerability

Published Oct 25, 2023 · catalog updated Jun 16, 2026 · VMware vCenter Server

Patch now

CVE-2023-34048 is in the CISA known-exploited catalog, due Feb 12, 2024. Confirm VMware vCenter Server against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
99.43%
Remediation
Remediation guidance
Affected products
cpe vmware/vcenter server · vendor VMware vCenter Server

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe vmware/vcenter server7.0
  • vendor VMware vCenter Serverversion unspecified

How to fix CVE-2023-34048

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2023-34048 is in the CISA known-exploited catalog, due Feb 12, 2024. Confirm VMware vCenter Server against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with vmware/vcenter server 7.0. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

What should an analyst verify?

CWE-787: Out-of-bounds Write. EPSS 99.43%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 25, 2023 · Catalog

    Detected

    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.

  2. Jan 22, 2024 · CISA KEV

    Known exploited

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

  3. Feb 12, 2024 · CISA KEV

    Remediation due

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

  4. Jun 16, 2026 · Catalog

    Updated

    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.

Sources

  • CISA KEVConfirmed exploitationCVE-2023-34048

    VMware vCenter Server contains an out-of-bounds write vulnerability in the implementation of the DCERPC protocol that allows an attacker to conduct remote code execution.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2023-34048

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-34048

    30-day exploitation probability 99.4%

    first.org
  • NIST NVDVulnerability recordCVE-2023-34048

    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.

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2023-34048

    VMware vCenter Server contains an out-of-bounds write vulnerability in the implementation of the DCERPC protocol that allows an attacker to conduct remote code execution.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.