CVE-2022-21861

Local privilege escalation through undisclosed mechanism

Published Jan 11, 2022 · Updated Jan 2, 2025

Elevation of privilege in Task Flow Data Engine in Microsoft Windows allows local users to obtain elevated privileges on the host. Microsoft has not published the affected code path or the incorrect operation that enables the elevation. Exploitation requires an existing low-privilege local account and grants higher control over the affected Windows host.

CVSS severity7.0
High
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Elevation of privilege in Task Flow Data Engine in Microsoft Windows allows local users to obtain elevated privileges on the host. Microsoft has not published the affected code path or the incorrect operation that enables the elevation. Exploitation requires an existing low-privilege local account and grants higher control over the affected Windows host.

The record

CVE
CVE-2022-21861
Published
Jan 11, 2022
Updated
Jan 2, 2025
Vendor
Microsoft
Product
Windows Server 2019
Classifications
T1068
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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 10 Version 21H1version=10.0.0 <10.0.19043.1466
Microsoft · Windows 10 Version 1909version=10.0.0 <10.0.18363.2037
Microsoft · Windows 11 version 21H2version=10.0.0 <10.0.22000.434
Microsoft · Windows 10 Version 21H2version=10.0.19043.0 <10.0.19044.1466
Microsoft · Windows 10 Version 20H2version=10.0.0 <10.0.19042.1466
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.2452
Microsoft · Windows Server version 20H2version=10.0.0 <10.0.19042.1466
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.469
Microsoft · Windows 10 Version 1809version=10.0.0 <10.0.17763.2452; version=10.0.17763.0 <10.0.17763.2452

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2NVDAV:L/AC:L/Au:N/C:C/I:C/A:C
7.0MicrosoftCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/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

T1068Exploitation for Privilege Escalation

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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