CVE-2023-24937Network attack vector

Authenticated service interruption via improper input validation

Published Jun 14, 2023 · Updated Jan 1, 2025

Improper input validation in Windows CryptoAPI on affected Windows releases allows remote authenticated users to cause a service interruption. Microsoft identifies CWE-20 but has not published the malformed input, code locus, or exact validation failure within CryptoAPI. Low-privileged network access is required, and the published impact is limited to availability, with no reported data disclosure or modification.

CVSS severity6.5
Medium
EPSS probability2.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Windows CryptoAPI on affected Windows releases allows remote authenticated users to cause a service interruption. Microsoft identifies CWE-20 but has not published the malformed input, code locus, or exact validation failure within CryptoAPI. Low-privileged network access is required, and the published impact is limited to availability, with no reported data disclosure or modification.

The record

CVE
CVE-2023-24937
Published
Jun 14, 2023
Updated
Jan 1, 2025
Vendor
Microsoft
Product
Windows Server 2019
Classifications
CWE-20, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 1, 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 <10.0.17763.4499

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.4499
Microsoft · Windows 11 version 21H2version=10.0.0 <10.0.22000.2057
Microsoft · Windows 10 Version 21H2version=10.0.19043.0 <10.0.19044.3086
Microsoft · Windows 10 Version 22H2version=10.0.19045.0 <10.0.19045.3086
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.4499
Microsoft · Windows 11, version 22H2version=10.0.22621.0 <10.0.22621.1848
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.1787
Microsoft · Windows 10 Version 1809version=10.0.0 <10.0.17763.4499; version=10.0.17763.0 <10.0.17763.4499

Published CVSS scores

6.5MicrosoftCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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-20Improper Input Validation
T1499Endpoint Denial of Service

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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