CVE-2021-41379 (GCVE-0-2021-41379)
Vulnerability from cvelistv5 – Published: 2021-11-10 00:46 – Updated: 2025-10-21 23:25Title
Windows Installer Elevation of Privilege Vulnerability
Summary
Windows Installer Elevation of Privilege Vulnerability
Severity
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- Elevation of Privilege
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://portal.msrc.microsoft.com/en-US/security-… | x_refsource_MISC |
| https://www.zerodayinitiative.com/advisories/ZDI-… | x_refsource_MISC |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
27 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Windows 10 Version 1809 |
Affected:
10.0.0 , < 10.0.17763.2300
(custom)
cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.2300:*:*:*:*:*:x86:* cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.2300:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.2300:*:*:*:*:*:arm64:* |
|
| Microsoft | Windows Server 2019 |
Affected:
10.0.0 , < 10.0.17763.2300
(custom)
cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.2300:*:*:*:*:*:*:* |
|
| Microsoft | Windows Server 2019 (Server Core installation) |
Affected:
10.0.0 , < 10.0.17763.2300
(custom)
cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.2300:*:*:*:*:*:*:* |
|
| Microsoft | Windows 10 Version 1909 |
Affected:
10.0.0 , < 10.0.18363.1916
(custom)
cpe:2.3:o:microsoft:windows_10_1909:10.0.18363.1916:*:*:*:*:*:x86:* cpe:2.3:o:microsoft:windows_10_1909:10.0.18363.1916:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_10_1809:10.0.18363.1916:*:*:*:*:*:x64:* |
|
| Microsoft | Windows 10 Version 21H1 |
Affected:
10.0.0 , < 10.0.19043.1348
(custom)
cpe:2.3:o:microsoft:windows_10_21H1:10.0.19043.1348:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_10_21H1:10.0.19043.1348:*:*:*:*:*:arm64:* cpe:2.3:o:microsoft:windows_10_21H1:10.0.19043.1348:*:*:*:*:*:x86:* |
|
| Microsoft | Windows Server 2022 |
Affected:
10.0.0 , < 10.0.20348.350
(custom)
cpe:2.3:o:microsoft:windows_server_2022:10.0.20348.350:*:*:*:*:*:*:* |
|
| Microsoft | Windows 10 Version 2004 |
Affected:
10.0.0 , < 10.0.19041.1348
(custom)
cpe:2.3:o:microsoft:windows_10_1809:10.0.19041.1348:*:*:*:*:*:x64:* |
|
| Microsoft | Windows Server version 2004 |
Affected:
10.0.0 , < 10.0.19041.1348
(custom)
cpe:2.3:o:microsoft:windows_server_2004:10.0.19041.1348:*:*:*:*:*:*:* |
|
| Microsoft | Windows 10 Version 20H2 |
Affected:
10.0.0 , < 10.0.19042.1348
(custom)
cpe:2.3:o:microsoft:windows_10_20H2:10.0.19042.1348:*:*:*:*:*:x86:* cpe:2.3:o:microsoft:windows_10_20H2:10.0.19042.1348:*:*:*:*:*:arm64:* |
|
| Microsoft | Windows Server version 20H2 |
Affected:
10.0.0 , < 10.0.19042.1348
(custom)
cpe:2.3:o:microsoft:windows_server_20H2:10.0.19042.1348:*:*:*:*:*:*:* |
|
| Microsoft | Windows 11 version 21H2 |
Affected:
10.0.0 , < 10.0.22000.318
(custom)
cpe:2.3:o:microsoft:windows_11_21H2:10.0.22000.318:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_11_21H2:10.0.22000.318:*:*:*:*:*:arm64:* |
|
| Microsoft | Windows 10 Version 1507 |
Affected:
10.0.0 , < 10.0.10240.19119
(custom)
cpe:2.3:o:microsoft:windows_10_1507:10.0.10240.19119:*:*:*:*:*:x86:* cpe:2.3:o:microsoft:windows_10_1507:10.0.10240.19119:*:*:*:*:*:x64:* |
|
| Microsoft | Windows 10 Version 1607 |
Affected:
10.0.0 , < 10.0.14393.4770
(custom)
cpe:2.3:o:microsoft:windows_10_1607:10.0.14393.4770:*:*:*:*:*:x86:* cpe:2.3:o:microsoft:windows_10_1607:10.0.14393.4770:*:*:*:*:*:x64:* |
|
| Microsoft | Windows Server 2016 |
Affected:
10.0.0 , < 10.0.14393.4770
(custom)
cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4770:*:*:*:*:*:*:* |
|
| Microsoft | Windows Server 2016 (Server Core installation) |
Affected:
10.0.0 , < 10.0.14393.4770
(custom)
cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4770:*:*:*:*:*:*:* |
|
| Microsoft | Windows 7 |
Affected:
6.1.0 , < 6.1.7601.25769
(custom)
cpe:2.3:o:microsoft:windows_7:6.1.7601.25769:sp1:*:*:*:*:x86:* |
|
| Microsoft | Windows 7 Service Pack 1 |
Affected:
6.1.0 , < 6.1.7601.25769
(custom)
cpe:2.3:o:microsoft:windows_7:6.1.7601.25769:sp1:*:*:*:*:x64:* |
|
| Microsoft | Windows 8.1 |
Affected:
6.3.0 , < 6.3.9600.20174
(custom)
cpe:2.3:o:microsoft:windows_8.1:6.3.9600.20174:*:*:*:*:*:x86:* cpe:2.3:o:microsoft:windows_8.1:6.3.9600.20174:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_rt_8.1:6.3.9600.20174:*:*:*:*:*:*:* |
|
| Microsoft | Windows Server 2008 Service Pack 2 |
Affected:
6.0.0 , < 6.0.6003.21282
(custom)
cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21282:*:*:*:*:*:x64:* |
|
| Microsoft | Windows Server 2008 Service Pack 2 (Server Core installation) |
Affected:
6.0.0 , < 6.0.6003.21282
(custom)
cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21282:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21282:*:*:*:*:*:x86:* |
|
| Microsoft | Windows Server 2008 Service Pack 2 |
Affected:
6.0.0 , < 6.0.6003.21282
(custom)
cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21282:*:*:*:*:*:x86:* |
|
| Microsoft | Windows Server 2008 R2 Service Pack 1 |
Affected:
6.1.0 , < 6.1.7601.25769
(custom)
cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25769:*:*:*:*:*:x64:* |
|
| Microsoft | Windows Server 2008 R2 Service Pack 1 (Server Core installation) |
Affected:
6.0.0 , < 6.1.7601.25769
(custom)
cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25769:*:*:*:*:*:x64:* |
|
| Microsoft | Windows Server 2012 |
Affected:
6.2.0 , < 6.2.9200.23517
(custom)
cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23517:*:*:*:*:*:x64:* |
|
| Microsoft | Windows Server 2012 (Server Core installation) |
Affected:
6.2.0 , < 6.2.9200.23517
(custom)
cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23517:*:*:*:*:*:x64:* |
|
| Microsoft | Windows Server 2012 R2 |
Affected:
6.3.0 , < 6.3.9600.20174
(custom)
cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20174:*:*:*:*:*:x64:* |
|
| Microsoft | Windows Server 2012 R2 (Server Core installation) |
Affected:
6.3.0 , < 6.3.9600.20174
(custom)
cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20174:*:*:*:*:*:x64:* |
Date Public
2021-11-09 08:00
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 4bc8a80a-e207-4334-92a9-c1166e007e6f
Exploited: Yes
Timestamps
First Seen: 2022-03-03
Asserted: 2022-03-03
Scope
Notes: KEV entry: Microsoft Windows Installer Privilege Escalation Vulnerability | Affected: Microsoft / Windows | Description: Microsoft Windows Installer contains an unspecified vulnerability that allows for privilege escalation. | Required action: Apply updates per vendor instructions. | Due date: 2022-03-17 | Known ransomware campaign use (KEV): Known | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2021-41379
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-1386 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | Windows |
| Due Date | 2022-03-17 |
| Date Added | 2022-03-03 |
| Vendorproject | Microsoft |
| Vulnerabilityname | Microsoft Windows Installer Privilege Escalation Vulnerability |
| Knownransomwarecampaignuse | Known |
References
Created: 2026-02-02 12:28 UTC
| Updated: 2026-02-06 07:17 UTC
KEVIntel
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: ac1aa63d-9220-412c-85d6-1ab6bd583ce7
Exploited: Yes
Timestamps
First Seen: 2022-03-03
Asserted: 2022-03-03
Scope
Notes: KEVIntel entry: Windows Installer Elevation of Privilege Vulnerability | Affected: Microsoft / Windows 10 Version 1809, Windows Server 2019, Windows Server 2019 (Server Core installation), Windows 10 Version 1909, Windows 10 Version 21H1, Windows Server 2022, Windows 10 Version 2004, Windows Server version 2004, Windows 10 Version 20H2, Windows Server version 20H2, Windows 11 version 21H2, Windows 10 Version 1507, Windows 10 Version 1607, Windows Server 2016, Windows Server 2016 (Server Core installation), Windows 7, Windows 7 Service Pack 1, Windows 8.1, Windows Server 2008 Service Pack 2, Windows Server 2008 Service Pack 2 (Server Core installation), Windows Server 2008 Service Pack 2, Windows Server 2008 R2 Service Pack 1, Windows Server 2008 R2 Service Pack 1 (Server Core installation), Windows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation) | CVSS: 5.5 (MEDIUM) | Used in malware: yes | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Confirmed Compromise
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | Windows Installer Elevation of Privilege Vulnerability |
| Vendor | Microsoft |
| Product | Windows 10 Version 1809, Windows Server 2019, Windows Server 2019 (Server Core installation), Windows 10 Version 1909, Windows 10 Version 21H1, Windows Server 2022, Windows 10 Version 2004, Windows Server version 2004, Windows 10 Version 20H2, Windows Server version 20H2, Windows 11 version 21H2, Windows 10 Version 1507, Windows 10 Version 1607, Windows Server 2016, Windows Server 2016 (Server Core installation), Windows 7, Windows 7 Service Pack 1, Windows 8.1, Windows Server 2008 Service Pack 2, Windows Server 2008 Service Pack 2 (Server Core installation), Windows Server 2008 Service Pack 2, Windows Server 2008 R2 Service Pack 1, Windows Server 2008 R2 Service Pack 1 (Server Core installation), Windows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation) |
| Added Date | 2022-03-03T00:00:00.000Z |
| Cvss Score | 5.5 |
| Epss Score | None |
| Cvss Severity | MEDIUM |
| Epss Percentile | None |
| Used In Malware | yes |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-06-23 14:05 UTC
| Updated: 2026-06-23 14:05 UTC
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Core installation)\", \"versions\": [{\"status\": \"affected\", \"version\": \"10.0.0\", \"lessThan\": \"10.0.14393.4770\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_7:6.1.7601.25769:sp1:*:*:*:*:x86:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows 7\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.1.0\", \"lessThan\": \"6.1.7601.25769\", \"versionType\": \"custom\"}], \"platforms\": [\"32-bit Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_7:6.1.7601.25769:sp1:*:*:*:*:x64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows 7 Service Pack 1\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.1.0\", \"lessThan\": \"6.1.7601.25769\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_8.1:6.3.9600.20174:*:*:*:*:*:x86:*\", \"cpe:2.3:o:microsoft:windows_8.1:6.3.9600.20174:*:*:*:*:*:x64:*\", \"cpe:2.3:o:microsoft:windows_rt_8.1:6.3.9600.20174:*:*:*:*:*:*:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows 8.1\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.3.0\", \"lessThan\": \"6.3.9600.20174\", \"versionType\": \"custom\"}], \"platforms\": [\"32-bit Systems\", \"x64-based Systems\", \"ARM64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21282:*:*:*:*:*:x64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2008 Service Pack 2\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.0.0\", \"lessThan\": \"6.0.6003.21282\", \"versionType\": \"custom\"}], \"platforms\": [\"32-bit Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21282:*:*:*:*:*:x64:*\", \"cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21282:*:*:*:*:*:x86:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2008 Service Pack 2 (Server Core installation)\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.0.0\", \"lessThan\": \"6.0.6003.21282\", \"versionType\": \"custom\"}], \"platforms\": [\"32-bit Systems\", \"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21282:*:*:*:*:*:x86:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2008 Service Pack 2\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.0.0\", \"lessThan\": \"6.0.6003.21282\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25769:*:*:*:*:*:x64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2008 R2 Service Pack 1\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.1.0\", \"lessThan\": \"6.1.7601.25769\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25769:*:*:*:*:*:x64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2008 R2 Service Pack 1 (Server Core installation)\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.0.0\", \"lessThan\": \"6.1.7601.25769\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23517:*:*:*:*:*:x64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2012\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.2.0\", \"lessThan\": \"6.2.9200.23517\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23517:*:*:*:*:*:x64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2012 (Server Core installation)\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.2.0\", \"lessThan\": \"6.2.9200.23517\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20174:*:*:*:*:*:x64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2012 R2\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.3.0\", \"lessThan\": \"6.3.9600.20174\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\"]}, {\"cpes\": [\"cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20174:*:*:*:*:*:x64:*\"], \"vendor\": \"Microsoft\", \"product\": \"Windows Server 2012 R2 (Server Core installation)\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.3.0\", \"lessThan\": \"6.3.9600.20174\", \"versionType\": \"custom\"}], \"platforms\": [\"x64-based Systems\"]}], \"datePublic\": \"2021-11-09T08:00:00.000Z\", \"references\": [{\"url\": \"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41379\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://www.zerodayinitiative.com/advisories/ZDI-21-1308/\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en-US\", \"value\": \"Windows Installer Elevation of Privilege Vulnerability\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en-US\", \"type\": \"Impact\", \"description\": \"Elevation of Privilege\"}]}], \"providerMetadata\": {\"orgId\": \"f38d906d-7342-40ea-92c1-6c4a2c6478c8\", \"shortName\": \"microsoft\", \"dateUpdated\": \"2024-05-29T14:47:38.867Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2021-41379\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-21T23:25:26.741Z\", \"dateReserved\": \"2021-09-17T00:00:00.000Z\", \"assignerOrgId\": \"f38d906d-7342-40ea-92c1-6c4a2c6478c8\", \"datePublished\": \"2021-11-10T00:46:55.000Z\", \"assignerShortName\": \"microsoft\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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