MEDIUMCVSS 5.5Actively exploited · CISA KEV since 2022-03-03Vulnerability

CVE-2021-41379

Microsoft Windows Installer contains an unspecified vulnerability that allows for privilege escalation.

Properties

Euvd product
Windows 10 Version 20H2, Windows 10 Version 1507, Windows 10 Version 1607, Windows Server 2008 Service Pack 2, Windows Server 2019 (Server Core installation), Windows Server version 20H2, Windows Server 2012 R2 (Server Core installation), Windows Server 2019, Windows 8.1, Windows Server 2012, Windows Server version 2004, Windows Server 2022, Windows 7, Windows 10 Version 21H1, Windows Server 2016 (Server Core installation), Windows 10 Version 1909, Windows Server 2016, Windows 7 Service Pack 1, Windows Server 2008 Service Pack 2 (Server Core installation), Windows Server 2008 R2 Service Pack 1, Windows 10 Version 1809, Windows 10 Version 2004, Windows Server 2012 R2, Windows Server 2012 (Server Core installation), Windows 11 version 21H2
Vulnerability name
Microsoft Windows Installer Privilege Escalation Vulnerability
First seen
2026-08-19T16:26:56+00:00
Cvss score
5.5
Epss score
0.19452
Last seen
2026-10-19T12:00:27+00:00
Due date
2022-03-17
Euvd assigner
microsoft
Retrieved at
2026-10-21T01:24:47+00:00
Exploited euvd since
2022-03-03T00:00:00+00:00
Src batch id
epss_history-20261020T103617Z-728ddd
Source url
https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
Date added
2022-03-03
Euvd base score version
3.1
Score
5.5
Fetched at
2026-10-20T10:36:20+00:00
Euvd vendor
Microsoft
Cvss vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
In Signal since
initial import (Sep 2026)
Euvd base score
5.5

Related Entities (23)

AFFECTS_PRODUCT (20)

→[Product]cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_20h2:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_10_2004:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_10_21h1:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*

DESCRIBES (1)

←[KEVEntry]Microsoft Windows Installer Privilege Escalation Vulnerability

HAS_WEAKNESS (1)

→[Weakness]Improper Link Resolution Before File Access ('Link Following')

INVOLVES (1)

←[Signal]kev_added · 2022-03-03

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CVE-2021-41379 (CVSS 5.5) — Ninja Signal Threat Intelligence | Ninja Signal