CVE-2021-38634
published 2021-09-15CVE-2021-38634: Microsoft Windows Update Client Elevation of Privilege Vulnerability
PriorityP339high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.86%
56.1th percentile
Microsoft Windows Update Client Elevation of Privilege Vulnerability
Affected
33 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | windows_10 | — | — |
| microsoft | windows_10 | — | — |
| microsoft | windows_10 | — | — |
| microsoft | windows_10 | — | — |
| microsoft | windows_10 | — | — |
| microsoft | windows_10 | — | — |
| microsoft | windows_10_version_1507 | >= 10.0.10240.0 < 10.0.10240.19060 | 10.0.10240.19060 |
| microsoft | windows_10_version_1607 | >= 10.0.14393.0 < 10.0.14393.4651 | 10.0.14393.4651 |
| microsoft | windows_10_version_1809 | >= 10.0.0 < 10.0.17763.2183 | 10.0.17763.2183 |
| microsoft | windows_10_version_1809 | >= 10.0.17763.0 < 10.0.17763.2183 | 10.0.17763.2183 |
| microsoft | windows_10_version_1909 | >= 10.0.0 < 10.0.18363.1801 | 10.0.18363.1801 |
| microsoft | windows_10_version_2004 | >= 10.0.0 < 10.0.19041.1237 | 10.0.19041.1237 |
| microsoft | windows_10_version_20h2 | >= 10.0.0 < 10.0.19042.1237 | 10.0.19042.1237 |
| microsoft | windows_10_version_21h1 | >= 10.0.0 < 10.0.19043.1237 | 10.0.19043.1237 |
| microsoft | windows_server_2016 | — | — |
| microsoft | windows_server_2016 | — | — |
| microsoft | windows_server_2016 | >= 10.0.14393.0 < 10.0.14393.4651 | 10.0.14393.4651 |
| microsoft | windows_server_2019 | >= 10.0.17763.0 < 10.0.17763.2183 | 10.0.17763.2183 |
| microsoft | windows_server_2022 | >= 10.0.20348.0 < 10.0.20348.230 | 10.0.20348.230 |
| microsoft | windows_server_version_2004 | >= 10.0.0 < 10.0.19041.1237 | 10.0.19041.1237 |
| microsoft | windows_server_version_20h2 | >= 10.0.0 < 10.0.19042.1237 | 10.0.19042.1237 |
| msrc | windows_10 | — | — |
| msrc | windows_10_version_1607 | — | — |
| msrc | windows_10_version_1809 | — | — |
| msrc | windows_10_version_1909 | — | — |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.2HIGHAV:L/AC:L/Au:N/C:C/I:C/A:C
vendor_msrc7.1HIGH
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Microsoft
Microsoft Windows Update Client Elevation of Privilege Vulnerability
vendor_msrc·2021-09-14·CVSS 7.1
CVE-2021-38634 [HIGH] Microsoft Windows Update Client Elevation of Privilege Vulnerability
Microsoft Windows Update Client Elevation of Privilege Vulnerability
Windows Update: Windows Update
Microsoft: Microsoft
Impact: Elevation of Privilege
Exploit Status: Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely;Older Software Release:Exploitation Less Likely;DOS:N/A
Reference: https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5005568
Reference: https://support.microsoft.com/help/5005568
Reference: https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5005566
Reference: https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5005565
Reference: https://support.microsoft.com/help/5005565
Reference: https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5005575
Reference: https://catalog.update.microsoft.com/v7/si
VulDB
Microsoft Windows up to Server 2022 Update Client privileges management
vuldb·2026-08-13·CVSS 7.8
CVE-2021-38634 [HIGH] Microsoft Windows up to Server 2022 Update Client privileges management
A vulnerability categorized as critical has been discovered in Microsoft Windows. This affects an unknown function of the component Update Client. The manipulation results in improper privilege management.
This vulnerability is reported as CVE-2021-38634. The attack can be launched remotely. No exploit exists.
It is advisable to implement a patch to correct this issue.
GHSA
GHSA-p3jw-cchq-r2fw: Microsoft Windows Update Client Elevation of Privilege Vulnerability
ghsa_unreviewed·2022-05-24
CVE-2021-38634 [HIGH] CWE-269 GHSA-p3jw-cchq-r2fw: Microsoft Windows Update Client Elevation of Privilege Vulnerability
Microsoft Windows Update Client Elevation of Privilege Vulnerability
No detection rules found.
No public exploits indexed.
2021-09-15
Published