CVE-2020-1054 (GCVE-0-2020-1054)
Vulnerability from cvelistv5 – Published: 2020-05-21 22:52 – Updated: 2026-08-19 16:33Title
Win32k Elevation of Privilege Vulnerability
Summary
An elevation of privilege vulnerability exists in Windows when the Windows kernel-mode driver fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system.
The update addresses this vulnerability by correcting how the Windows kernel-mode driver handles objects in memory.
Severity
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-07 15:14 UTC
CWE
- Elevation of Privilege
- CWE-787 - Out-of-bounds Write
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
| https://portal.msrc.microsoft.com/en-US/security-… | x_refsource_MISCx_transferred |
| http://packetstormsecurity.com/files/160515/Micro… | x_refsource_MISCx_transferred |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
29 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1507 |
Affected:
10.0.10240.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows 10 Version 1607 |
Affected:
10.0.14393.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows 10 Version 1709 |
Affected:
10.0.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows 10 Version 1709 for 32-bit Systems |
Affected:
10.0.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows 10 Version 1803 |
Affected:
10.0.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows 10 Version 1809 |
Affected:
10.0.17763.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows 10 Version 1809 |
Affected:
10.0.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows 10 Version 1903 for 32-bit Systems |
Affected:
10.0.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows 10 Version 1903 for ARM64-based Systems |
Affected:
10.0.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows 10 Version 1903 for x64-based Systems |
Affected:
10.0.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows 10 Version 1909 |
Affected:
10.0.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows 7 |
Affected:
6.1.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows 7 Service Pack 1 |
Affected:
6.1.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows 8.1 |
Affected:
6.3.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows Server 2008 R2 Service Pack 1 |
Affected:
6.1.7601.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows Server 2008 R2 Service Pack 1 (Server Core installation) |
Affected:
6.1.7601.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows Server 2008 Service Pack 2 |
Affected:
6.0.6003.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows Server 2008 Service Pack 2 (Server Core installation) |
Affected:
6.0.6003.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows Server 2012 |
Affected:
6.2.9200.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows Server 2012 (Server Core installation) |
Affected:
6.2.9200.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows Server 2012 R2 |
Affected:
6.3.9600.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows Server 2012 R2 (Server Core installation) |
Affected:
6.3.9600.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows Server 2016 |
Affected:
10.0.14393.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows Server 2016 (Server Core installation) |
Affected:
10.0.14393.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows Server 2019 |
Affected:
10.0.17763.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows Server 2019 (Server Core installation) |
Affected:
10.0.17763.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows Server, version 1803 (Server Core Installation) |
Affected:
10.0.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows Server, version 1903 (Server Core installation) |
Affected:
10.0.0 , < publication
(custom)
|
guessed | |
| Microsoft | Windows Server, version 1909 (Server Core installation) |
Affected:
10.0.0 , < publication
(custom)
|
guessed |
Date Public
2020-05-12 14:00
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 20ea4c83-4210-40b4-b095-0bd80b3dffc0
Exploited: Yes
Timestamps
First Seen: 2021-11-03
Asserted: 2021-11-03
Scope
Notes: KEV entry: Microsoft Win32k Privilege Escalation Vulnerability | Affected: Microsoft / Win32k | Description: Microsoft Win32k contains a privilege escalation vulnerability when the Windows kernel-mode driver fails to properly handle objects in memory. Successful exploitation allows an attacker to execute code in kernel mode. | Required action: Apply updates per vendor instructions. | Due date: 2022-05-03 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2020-1054
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-787 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | Win32k |
| Due Date | 2022-05-03 |
| Date Added | 2021-11-03 |
| Vendorproject | Microsoft |
| Vulnerabilityname | Microsoft Win32k Privilege Escalation Vulnerability |
| Knownransomwarecampaignuse | Unknown |
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: d751d4f8-5f9f-4063-b1b9-81e85e548821
Exploited: Yes
Timestamps
First Seen: 2021-11-03
Asserted: 2021-11-03
Scope
Notes: KEVIntel entry: An elevation of privilege vulnerability exists in Windows when the Windows kernel-mode driver fails to properly handle objects in memory, aka... | Affected: Microsoft / Windows, Windows Server, Windows 10 Version 1909 for 32-bit Systems, Windows 10 Version 1909 for x64-based Systems, Windows 10 Version 1909 for ARM64-based Systems, Windows Server, version 1909 (Server Core installation), Windows 10 Version 1903 for 32-bit Systems, Windows 10 Version 1903 for x64-based Systems, Windows 10 Version 1903 for ARM64-based Systems, Windows Server, version 1903 (Server Core installation) | CVSS: 7.8 (HIGH) | Used in malware: unknown | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | An elevation of privilege vulnerability exists in Windows when the Windows kernel-mode driver fails to properly handle objects in memory, aka... |
| Vendor | Microsoft |
| Product | Windows, Windows Server, Windows 10 Version 1909 for 32-bit Systems, Windows 10 Version 1909 for x64-based Systems, Windows 10 Version 1909 for ARM64-based Systems, Windows Server, version 1909 (Server Core installation), Windows 10 Version 1903 for 32-bit Systems, Windows 10 Version 1903 for x64-based Systems, Windows 10 Version 1903 for ARM64-based Systems, Windows Server, version 1903 (Server Core installation) |
| Added Date | 2021-11-03T00:00:00.000Z |
| Cvss Score | 7.8 |
| Epss Score | None |
| Cvss Severity | HIGH |
| Epss Percentile | None |
| Used In Malware | unknown |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-06-23 14:08 UTC
| Updated: 2026-07-10 06:14 UTC
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\"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"10.0.0\"}, {\"criteria\": \"cpe:2.3:o:microsoft:windows_10:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"10.0.0\"}, {\"criteria\": \"cpe:2.3:o:microsoft:windows_10:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"10.0.0\"}, {\"criteria\": \"cpe:2.3:o:microsoft:windows_10:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"10.0.0\"}, {\"criteria\": \"cpe:2.3:o:microsoft:windows_10:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"10.0.0\"}, {\"criteria\": \"cpe:2.3:o:microsoft:windows_server_1903:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"10.0.0\"}, {\"criteria\": \"cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x86:*\", \"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"10.0.10240.0\"}, {\"criteria\": \"cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*\", \"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"10.0.14393.0\"}, {\"criteria\": \"cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"10.0.14393.0\"}, {\"criteria\": \"cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"10.0.14393.0\"}, {\"criteria\": \"cpe:2.3:o:microsoft:windows_7:*:sp1:*:*:*:*:x86:*\", \"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"6.1.0\"}, {\"criteria\": \"cpe:2.3:o:microsoft:windows_7:*:sp1:*:*:*:*:x64:*\", \"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"6.1.0\"}, {\"criteria\": \"cpe:2.3:o:microsoft:windows_8.1:*:*:*:*:*:*:x86:*\", \"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"6.3.0\"}, {\"criteria\": \"cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*\", \"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"6.0.6003.0\"}, {\"criteria\": \"cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*\", \"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"6.0.6003.0\"}, {\"criteria\": \"cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*\", \"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"6.1.7601.0\"}, {\"criteria\": \"cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*\", \"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"6.1.7601.0\"}, {\"criteria\": \"cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*\", \"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"6.2.9200.0\"}, {\"criteria\": \"cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*\", \"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"6.2.9200.0\"}, {\"criteria\": \"cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*\", \"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"6.3.9600.0\"}, {\"criteria\": \"cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*\", \"vulnerable\": true, \"versionEndExcluding\": \"publication\", \"versionStartIncluding\": \"6.3.9600.0\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"f38d906d-7342-40ea-92c1-6c4a2c6478c8\", \"shortName\": \"microsoft\", \"dateUpdated\": \"2026-08-19T16:33:26.085Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2020-1054\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-19T16:33:26.085Z\", \"dateReserved\": \"2019-11-04T00:00:00.000Z\", \"assignerOrgId\": \"f38d906d-7342-40ea-92c1-6c4a2c6478c8\", \"datePublished\": \"2020-05-21T22:52:50.000Z\", \"assignerShortName\": \"microsoft\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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