CVE-2023-32083Network attack vector

Privileged disclosure of unspecified information

Published Jul 11, 2023 · Updated Feb 28, 2025

A heap-based buffer overflow in Microsoft Failover Cluster on Windows Server 2016, 2019, and 2022 allows remote authenticated users to disclose data. Microsoft identifies the weakness but has not published the affected function, input, or erroneous memory operation. Exploitation requires network access with high privileges and can also interrupt availability; the record does not identify the disclosed data or failure mode.

CVSS severity6.5
Medium
EPSS probability1.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A heap-based buffer overflow in Microsoft Failover Cluster on Windows Server 2016, 2019, and 2022 allows remote authenticated users to disclose data. Microsoft identifies the weakness but has not published the affected function, input, or erroneous memory operation. Exploitation requires network access with high privileges and can also interrupt availability; the record does not identify the disclosed data or failure mode.

The record

CVE
CVE-2023-32083
Published
Jul 11, 2023
Updated
Feb 28, 2025
Vendor
Microsoft
Product
Windows Server 2019
Classifications
CWE-122
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.17763.0 <10.0.17763.4645

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.4645
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.6085
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.6085
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.4645
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.1850

Published CVSS scores

6.5Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H
4.9NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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