SECUFOCUSNOW
Home›CVE index›CVE-2021-38666
Priority reviewHigh

CVE-2021-38666

Microsoft Remote Desktop client for Windows Desktop, Windows 10 Version 1507, Windows 10 Version 1607

CVE-2021-38666 affects Microsoft Remote Desktop client for Windows Desktop, Windows 10 Version 1507, Windows 10 Version 1607. Review the CVSS score, exploitation signals, affected versions, remediation status, and linked source material before making a change.

CVSS
8.8
EPSS
13.8%
96.2% percentile
CISA KEV
Not listed
Published
2021.11.10
PRIORITY ASSESSMENT

Priority review

FIRST EPSS indicates an elevated probability of exploitation.

Known exploitationNot established by KEV
Exploit probability13.8%
Technical severityCVSS 8.8

Vulnerability overview

CVE-2021-38666 affects Microsoft Remote Desktop client for Windows Desktop, Windows 10 Version 1507, Windows 10 Version 1607. Review the CVSS score, exploitation signals, affected versions, remediation status, and linked source material before making a change.

Affected product and versions

Product
Microsoft Remote Desktop client for Windows Desktop, Windows 10 Version 1507, Windows 10 Version 1607
Affected versions
>= 10.0.10240.0 < 10.0.10240.19119, >= 10.0.14393.0 < 10.0.14393.4770, >= 10.0.17763.0 < 10.0.17763.2300, >= 10.0.0 < 10.0.17763.2300, >= 10.0.0 < 10.0.18363.1916, >= 10.0.0 < 10.0.19041.1348, >= 10.0.0 < 10.0.19042.1348, >= 10.0.0 < 10.0.19043.1348, >= 10.0.22000.0 < 10.0.22000.318, >= 6.1.0 < 6.1.7601.25769, >= 6.3.0 < 6.3.9600.20174, >= 6.1.7601.0 < 6.1.7601.25769, >= 6.0.6003.0 < 6.0.6003.21282, >= 6.2.9200.0 < 6.2.9200.23517, >= 6.3.9600.0 < 6.3.9600.20174, >= 10.0.20348.0 < 10.0.20348.350, 20h2, 21h1, 1607, 1809
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Microsoft Remote Desktop client for Windows Desktop, Windows 10 Version 1507, Windows 10 Version 1607 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
Not available