Medium 5.5Known exploited (CISA KEV)Published Nov 9, 2021

CVE-2021-41379Windows Installer Elevation of Privilege Vulnerability

Updated under an hour ago (Oct 26, 2026, 1:20 PM ET)

Does this affect you?

It affects Microsoft Windows 10 Version 1507 and 25 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Mar 3, 2022; federal agencies had to remediate by Mar 17, 2022, and it is known to be used in ransomware. Treat that date as your deadline.

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Every CVE for Microsoft Windows 10 Version 1507

Exploited in the last 30 days

Windows Installer Elevation of Privilege Vulnerability

CVSS: 5.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Weakness (CWE): CWE-59
Known exploited: Added to CISA KEV Mar 3, 2022; federal remediation due Mar 17, 2022; known ransomware useApply updates per vendor instructions.
EPSS (exploitation in the next 30 days): 19.45% (percentile 97)
Assigned by: microsoft
NVD analysis: Analyzed
Record last updated: Aug 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Microsoft Windows 10 Version 1507 microsoft:windows_10_1507	from 10.0.10240.0 before 10.0.10240.19119	CNA record
Microsoft Windows 10 Version 1607 microsoft:windows_10_1607	from 10.0.14393.0 before 10.0.14393.4770	CNA record
Microsoft Windows 10 Version 1809 microsoft:windows_10_1809	from 10.0.17763.0 before 10.0.17763.2300	CNA record
Microsoft Windows 10 Version 1909 microsoft:windows_10_1909	from 10.0.0 before 10.0.18363.1916	CNA record
Microsoft Windows 10 Version 2004 microsoft:windows_10_2004	from 10.0.0 before 10.0.19041.1348	CNA record
Microsoft Windows 10 Version 20H2 microsoft:windows_10_20h2	from 10.0.0 before 10.0.19042.1348	CNA record
Microsoft Windows 10 Version 21H1 microsoft:windows_10_21h1	from 10.0.0 before 10.0.19043.1348	CNA record
Microsoft Windows 11 version 21H2 microsoft:windows_11_21h2	from 10.0.22000.0 before 10.0.22000.318	CNA record
Microsoft Windows 7 microsoft:windows_7 (from the name)	from 6.1.0 before 6.1.7601.25769	CNA record
Microsoft Windows 7 Service Pack 1 microsoft:windows_7_service_pack_1 (from the name)	from 6.1.0 before 6.1.7601.25769	CNA record
1–10 of 40

References

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-41379	vendor-advisory, patch
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41379	patch, vendor-advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1308/	third-party-advisory, vdb-entry
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-41379	us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.