CVE-2022-21839

Local service interruption via undisclosed DACL handling

Published Jan 11, 2022 · Updated Jan 2, 2025

Denial of service in Windows Event Tracing DACL handling in Microsoft Windows 10 Version 1809 and Server 2019 allows local users to interrupt service. Microsoft has not published the operation on a DACL that causes the failure. Exploitation requires low-privileged local access and no user interaction; Microsoft identifies denial of service but does not specify a crash, hang, or reboot.

CVSS severity6.1
Medium
EPSS probability1.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Windows Event Tracing DACL handling in Microsoft Windows 10 Version 1809 and Server 2019 allows local users to interrupt service. Microsoft has not published the operation on a DACL that causes the failure. Exploitation requires low-privileged local access and no user interaction; Microsoft identifies denial of service but does not specify a crash, hang, or reboot.

The record

CVE
CVE-2022-21839
Published
Jan 11, 2022
Updated
Jan 2, 2025
Vendor
Microsoft
Product
Windows Server 2019
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 11, 2022CVE publishedPublication date reported by the CVE source.
  2. Jan 2, 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 <10.0.17763.2452

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.2452
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.2452
Microsoft · Windows 10 Version 1809version=10.0.0 <10.0.17763.2452; version=10.0.17763.0 <10.0.17763.2452

Published CVSS scores

6.1MicrosoftCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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