# Windows 10 21H1 vulnerabilities > Windows 10 21H1 is made by Microsoft. We track 89 published vulnerabilities in it, across 76 versions. 44 of them are on the list of flaws known to be exploited, the newest added on 23 April 2024. If you run Windows 10 21H1, check your version against the exploited flaws below and patch those first. Canonical page: https://www.precursorintelligence.com/product/microsoft/windows_10_21h1 ## At a glance - **Made by:** [Microsoft](https://www.precursorintelligence.com/vendors/microsoft) - **Published vulnerabilities:** 89 - **Known to be exploited:** 44 - **Versions tracked:** 76 - **Most recently added to the known-exploited list:** [CVE-2022-38028](https://www.precursorintelligence.com/what-is/cve-2022-38028), 23 April 2024. We keep watching the list. ## Which versions of Windows 10 21H1 do the exploited flaws hit? Each exploited flaw lists the versions it affects, as published. "before 10.0.19043.2130" means every version up to, but not including, 10.0.19043.2130. - [CVE-2022-38028](https://www.precursorintelligence.com/what-is/cve-2022-38028) (Microsoft Windows Print Spooler Privilege Escalation Vulnerability): before 10.0.19043.2130 - [CVE-2023-36584](https://www.precursorintelligence.com/what-is/cve-2023-36584) (Microsoft Windows Mark of the Web (MOTW) Security Feature Bypass Vulnerability): before 10.0.19041.3570 - [CVE-2022-44698](https://www.precursorintelligence.com/what-is/cve-2022-44698) (Microsoft Defender SmartScreen Security Feature Bypass Vulnerability): before 10.0.19043.2364 - [CVE-2022-41049](https://www.precursorintelligence.com/what-is/cve-2022-41049) (Microsoft Windows Mark of the Web (MOTW) Security Feature Bypass Vulnerability): before 10.0.19043.2251 - [CVE-2022-41125](https://www.precursorintelligence.com/what-is/cve-2022-41125) (Microsoft Windows CNG Key Isolation Service Privilege Escalation Vulnerability): before 10.0.19043.2251 - [CVE-2022-41091](https://www.precursorintelligence.com/what-is/cve-2022-41091) (Microsoft Windows Mark of the Web (MOTW) Security Feature Bypass Vulnerability): before 10.0.19043.2251 - [CVE-2022-41073](https://www.precursorintelligence.com/what-is/cve-2022-41073) (Microsoft Windows Print Spooler Privilege Escalation Vulnerability): before 10.0.19043.2251 - [CVE-2022-41128](https://www.precursorintelligence.com/what-is/cve-2022-41128) (Microsoft Windows Scripting Languages Remote Code Execution Vulnerability): before 10.0.19043.2251 - [CVE-2022-41033](https://www.precursorintelligence.com/what-is/cve-2022-41033) (Microsoft Windows COM+ Event System Service Privilege Escalation Vulnerability): before 10.0.19043.2130 - [CVE-2022-37969](https://www.precursorintelligence.com/what-is/cve-2022-37969) (Microsoft Windows Common Log File System (CLFS) Driver Privilege Escalation Vulnerability): before 10.0.19043.2006 - [CVE-2022-26923](https://www.precursorintelligence.com/what-is/cve-2022-26923) (Microsoft Active Directory Domain Services Privilege Escalation Vulnerability): before 10.0.19043.1706 - [CVE-2022-21971](https://www.precursorintelligence.com/what-is/cve-2022-21971) (Microsoft Windows Runtime Remote Code Execution Vulnerability): before 10.0.19043.1526 - [CVE-2022-34713](https://www.precursorintelligence.com/what-is/cve-2022-34713) (Microsoft Windows Support Diagnostic Tool (MSDT) Remote Code Execution Vulnerability): before 10.0.19043.1889 - [CVE-2022-22047](https://www.precursorintelligence.com/what-is/cve-2022-22047) (Microsoft Windows Client Server Runtime Subsystem (CSRSS) Privilege Escalation Vulnerability): before 10.0.19043.1826 - [CVE-2022-26925](https://www.precursorintelligence.com/what-is/cve-2022-26925) (Microsoft Windows LSA Spoofing Vulnerability): before 10.0.19043.1706 - [CVE-2022-30190](https://www.precursorintelligence.com/what-is/cve-2022-30190) (Microsoft Windows Support Diagnostic Tool (MSDT) Remote Code Execution Vulnerability): before 10.0.19043.1766 - [CVE-2021-41357](https://www.precursorintelligence.com/what-is/cve-2021-41357) (Microsoft Win32k Privilege Escalation Vulnerability): before 10.0.19043.1288 - [CVE-2022-21919](https://www.precursorintelligence.com/what-is/cve-2022-21919) (Microsoft Windows User Profile Service Privilege Escalation Vulnerability): before 10.0.19043.1466 - [CVE-2021-40450](https://www.precursorintelligence.com/what-is/cve-2021-40450) (Microsoft Win32k Privilege Escalation Vulnerability): before 10.0.19043.1288 - [CVE-2022-26904](https://www.precursorintelligence.com/what-is/cve-2022-26904) (Microsoft Windows User Profile Service Privilege Escalation Vulnerability): before 10.0.19043.1645 - [CVE-2022-22718](https://www.precursorintelligence.com/what-is/cve-2022-22718) (Microsoft Windows Print Spooler Privilege Escalation Vulnerability): before 10.0.19043.1526 - [CVE-2022-24521](https://www.precursorintelligence.com/what-is/cve-2022-24521) (Microsoft Windows CLFS Driver Privilege Escalation Vulnerability): before 10.0.19043.1645 - [CVE-2021-34484](https://www.precursorintelligence.com/what-is/cve-2021-34484) (Microsoft Windows User Profile Service Privilege Escalation Vulnerability): before 10.0.19043.1165 - [CVE-2021-34486](https://www.precursorintelligence.com/what-is/cve-2021-34486) (Microsoft Windows Event Tracing Privilege Escalation Vulnerability): before 10.0.19043.1165 - [CVE-2022-21999](https://www.precursorintelligence.com/what-is/cve-2022-21999) (Microsoft Windows Print Spooler Privilege Escalation Vulnerability): before 10.0.19043.1526 - [CVE-2021-41379](https://www.precursorintelligence.com/what-is/cve-2021-41379) (Microsoft Windows Installer Privilege Escalation Vulnerability): before 10.0.19043.1348 - [CVE-2021-36934](https://www.precursorintelligence.com/what-is/cve-2021-36934) (Microsoft Windows SAM Local Privilege Escalation Vulnerability): before 10.0.19043.1165 - [CVE-2022-21882](https://www.precursorintelligence.com/what-is/cve-2022-21882) (Microsoft Win32k Privilege Escalation Vulnerability): before 10.0.19043.1466 2 more exploited flaws name Windows 10 21H1 without a version of its own (for example as the system other affected software runs on). They are in the list below. Checked: the 30 most recently added of 44 exploited flaws. ## Which Windows 10 21H1 vulnerabilities are being exploited? 44 flaws are on the government list of vulnerabilities known to be exploited, newest first: - [CVE-2022-38028](https://www.precursorintelligence.com/what-is/cve-2022-38028): Microsoft Windows Print Spooler Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 15%, known exploited since 23 April 2024. - [CVE-2023-36584](https://www.precursorintelligence.com/what-is/cve-2023-36584): Microsoft Windows Mark of the Web (MOTW) Security Feature Bypass Vulnerability. Medium, CVSS 5.4, chance of use in 30 days 3.3%, known exploited since 16 November 2023. - [CVE-2022-44698](https://www.precursorintelligence.com/what-is/cve-2022-44698): Microsoft Defender SmartScreen Security Feature Bypass Vulnerability. Medium, CVSS 5.4, chance of use in 30 days 76%, known exploited since 13 December 2022. - [CVE-2022-41049](https://www.precursorintelligence.com/what-is/cve-2022-41049): Microsoft Windows Mark of the Web (MOTW) Security Feature Bypass Vulnerability. Medium, CVSS 5.4, chance of use in 30 days 2.6%, known exploited since 14 November 2022. - [CVE-2022-41125](https://www.precursorintelligence.com/what-is/cve-2022-41125): Microsoft Windows CNG Key Isolation Service Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 3.0%, known exploited since 8 November 2022. - [CVE-2022-41091](https://www.precursorintelligence.com/what-is/cve-2022-41091): Microsoft Windows Mark of the Web (MOTW) Security Feature Bypass Vulnerability. Medium, CVSS 5.4, chance of use in 30 days 1.9%, known exploited since 8 November 2022. - [CVE-2022-41073](https://www.precursorintelligence.com/what-is/cve-2022-41073): Microsoft Windows Print Spooler Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 2.4%, known exploited since 8 November 2022. - [CVE-2022-41128](https://www.precursorintelligence.com/what-is/cve-2022-41128): Microsoft Windows Scripting Languages Remote Code Execution Vulnerability. High, CVSS 8.8, chance of use in 30 days 25%, known exploited since 8 November 2022. - [CVE-2022-41033](https://www.precursorintelligence.com/what-is/cve-2022-41033): Microsoft Windows COM+ Event System Service Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 1.9%, known exploited since 11 October 2022. - [CVE-2022-37969](https://www.precursorintelligence.com/what-is/cve-2022-37969): Microsoft Windows Common Log File System (CLFS) Driver Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 28%, known exploited since 14 September 2022. - [CVE-2022-26923](https://www.precursorintelligence.com/what-is/cve-2022-26923): Microsoft Active Directory Domain Services Privilege Escalation Vulnerability. High, CVSS 8.8, chance of use in 30 days 84%, known exploited since 18 August 2022. - [CVE-2022-21971](https://www.precursorintelligence.com/what-is/cve-2022-21971): Microsoft Windows Runtime Remote Code Execution Vulnerability. High, CVSS 7.8, chance of use in 30 days 54%, known exploited since 18 August 2022. - [CVE-2022-34713](https://www.precursorintelligence.com/what-is/cve-2022-34713): Microsoft Windows Support Diagnostic Tool (MSDT) Remote Code Execution Vulnerability. High, CVSS 7.8, chance of use in 30 days 68%, known exploited since 9 August 2022. - [CVE-2022-22047](https://www.precursorintelligence.com/what-is/cve-2022-22047): Microsoft Windows Client Server Runtime Subsystem (CSRSS) Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 19%, known exploited since 12 July 2022. - [CVE-2022-26925](https://www.precursorintelligence.com/what-is/cve-2022-26925): Microsoft Windows LSA Spoofing Vulnerability. High, CVSS 8.1, chance of use in 30 days 10%, known exploited since 1 July 2022. - [CVE-2022-30190](https://www.precursorintelligence.com/what-is/cve-2022-30190): Microsoft Windows Support Diagnostic Tool (MSDT) Remote Code Execution Vulnerability. High, CVSS 7.8, chance of use in 30 days >99%, known exploited since 14 June 2022. - [CVE-2021-41357](https://www.precursorintelligence.com/what-is/cve-2021-41357): Microsoft Win32k Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 1.6%, known exploited since 25 April 2022. - [CVE-2022-21919](https://www.precursorintelligence.com/what-is/cve-2022-21919): Microsoft Windows User Profile Service Privilege Escalation Vulnerability. High, CVSS 7.0, chance of use in 30 days 2.4%, known exploited since 25 April 2022. - [CVE-2021-40450](https://www.precursorintelligence.com/what-is/cve-2021-40450): Microsoft Win32k Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 1.6%, known exploited since 25 April 2022. - [CVE-2022-26904](https://www.precursorintelligence.com/what-is/cve-2022-26904): Microsoft Windows User Profile Service Privilege Escalation Vulnerability. High, CVSS 7.0, chance of use in 30 days 17%, known exploited since 25 April 2022. - [CVE-2022-22718](https://www.precursorintelligence.com/what-is/cve-2022-22718): Microsoft Windows Print Spooler Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 18%, known exploited since 19 April 2022. - [CVE-2022-24521](https://www.precursorintelligence.com/what-is/cve-2022-24521): Microsoft Windows CLFS Driver Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 7.1%, known exploited since 13 April 2022. - [CVE-2021-34484](https://www.precursorintelligence.com/what-is/cve-2021-34484): Microsoft Windows User Profile Service Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 22%, known exploited since 31 March 2022. - [CVE-2021-34486](https://www.precursorintelligence.com/what-is/cve-2021-34486): Microsoft Windows Event Tracing Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 9.3%, known exploited since 28 March 2022. - [CVE-2022-21999](https://www.precursorintelligence.com/what-is/cve-2022-21999): Microsoft Windows Print Spooler Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 41%, known exploited since 25 March 2022. - [CVE-2021-41379](https://www.precursorintelligence.com/what-is/cve-2021-41379): Microsoft Windows Installer Privilege Escalation Vulnerability. Medium, CVSS 5.5, chance of use in 30 days 19%, known exploited since 3 March 2022. - [CVE-2021-36934](https://www.precursorintelligence.com/what-is/cve-2021-36934): Microsoft Windows SAM Local Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 67%, known exploited since 10 February 2022. - [CVE-2022-21882](https://www.precursorintelligence.com/what-is/cve-2022-21882): Microsoft Win32k Privilege Escalation Vulnerability. High, CVSS 7.0, chance of use in 30 days 59%, known exploited since 4 February 2022. - [CVE-2013-3900](https://www.precursorintelligence.com/what-is/cve-2013-3900): Microsoft WinVerifyTrust function Remote Code Execution. Medium, CVSS 5.5, chance of use in 30 days 45%, known exploited since 10 January 2022. - [CVE-2021-43890](https://www.precursorintelligence.com/what-is/cve-2021-43890): Microsoft Windows AppX Installer Spoofing Vulnerability. High, CVSS 7.1, chance of use in 30 days 11%, known exploited since 15 December 2021. - [CVE-2021-40449](https://www.precursorintelligence.com/what-is/cve-2021-40449): Microsoft Windows Win32k Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 74%, known exploited since 17 November 2021. - [CVE-2021-40444](https://www.precursorintelligence.com/what-is/cve-2021-40444): Microsoft MSHTML Remote Code Execution Vulnerability. High, CVSS 8.8, chance of use in 30 days 98%, known exploited since 3 November 2021. - [CVE-2021-36955](https://www.precursorintelligence.com/what-is/cve-2021-36955): Microsoft Windows Common Log File System (CLFS) Driver Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 4.1%, known exploited since 3 November 2021. - [CVE-2021-36948](https://www.precursorintelligence.com/what-is/cve-2021-36948): Microsoft Windows Update Medic Service Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 23%, known exploited since 3 November 2021. - [CVE-2021-34448](https://www.precursorintelligence.com/what-is/cve-2021-34448): Microsoft Windows Scripting Engine Memory Corruption Vulnerability. Medium, CVSS 6.8, chance of use in 30 days 40%, known exploited since 3 November 2021. - [CVE-2021-33771](https://www.precursorintelligence.com/what-is/cve-2021-33771): Microsoft Windows Kernel Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 10%, known exploited since 3 November 2021. - [CVE-2021-33742](https://www.precursorintelligence.com/what-is/cve-2021-33742): Microsoft Windows MSHTML Platform Remote Code Execution Vulnerability. High, CVSS 7.5, chance of use in 30 days 59%, known exploited since 3 November 2021. - [CVE-2021-33739](https://www.precursorintelligence.com/what-is/cve-2021-33739): Microsoft Desktop Window Manager (DWM) Core Library Privilege Escalation Vulnerability. High, CVSS 8.4, chance of use in 30 days 6.6%, known exploited since 3 November 2021. - [CVE-2021-31979](https://www.precursorintelligence.com/what-is/cve-2021-31979): Microsoft Windows Kernel Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 4.5%, known exploited since 3 November 2021. - [CVE-2021-31956](https://www.precursorintelligence.com/what-is/cve-2021-31956): Microsoft Windows NTFS Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 22%, known exploited since 3 November 2021. - [CVE-2021-31955](https://www.precursorintelligence.com/what-is/cve-2021-31955): Microsoft Windows Kernel Information Disclosure Vulnerability. Medium, CVSS 5.5, chance of use in 30 days 81%, known exploited since 3 November 2021. - [CVE-2021-31201](https://www.precursorintelligence.com/what-is/cve-2021-31201): Microsoft Enhanced Cryptographic Provider Privilege Escalation Vulnerability. Medium, CVSS 5.2, chance of use in 30 days 2.6%, known exploited since 3 November 2021. - [CVE-2021-31199](https://www.precursorintelligence.com/what-is/cve-2021-31199): Microsoft Enhanced Cryptographic Provider Privilege Escalation Vulnerability. Medium, CVSS 5.2, chance of use in 30 days 3.0%, known exploited since 3 November 2021. - [CVE-2021-1675](https://www.precursorintelligence.com/what-is/cve-2021-1675): Microsoft Windows Print Spooler Remote Code Execution Vulnerability. High, CVSS 7.8, chance of use in 30 days 85%, known exploited since 3 November 2021. ## Which Windows 10 21H1 flaws are most likely to be used? Ranked by the latest exploit-likelihood forecast (the chance each flaw is used in an attack in the next 30 days): - [CVE-2022-30190](https://www.precursorintelligence.com/what-is/cve-2022-30190): >99%, High (CVSS 7.8), known exploited - [CVE-2021-40444](https://www.precursorintelligence.com/what-is/cve-2021-40444): 98%, High (CVSS 8.8), known exploited - [CVE-2021-1675](https://www.precursorintelligence.com/what-is/cve-2021-1675): 85%, High (CVSS 7.8), known exploited - [CVE-2022-26923](https://www.precursorintelligence.com/what-is/cve-2022-26923): 84%, High (CVSS 8.8), known exploited - [CVE-2021-31955](https://www.precursorintelligence.com/what-is/cve-2021-31955): 81%, Medium (CVSS 5.5), known exploited - [CVE-2022-44698](https://www.precursorintelligence.com/what-is/cve-2022-44698): 76%, Medium (CVSS 5.4), known exploited - [CVE-2021-40449](https://www.precursorintelligence.com/what-is/cve-2021-40449): 74%, High (CVSS 7.8), known exploited - [CVE-2022-34713](https://www.precursorintelligence.com/what-is/cve-2022-34713): 68%, High (CVSS 7.8), known exploited - [CVE-2021-36934](https://www.precursorintelligence.com/what-is/cve-2021-36934): 67%, High (CVSS 7.8), known exploited - [CVE-2021-33742](https://www.precursorintelligence.com/what-is/cve-2021-33742): 59%, High (CVSS 7.5), known exploited ## Questions ### How many vulnerabilities does Windows 10 21H1 have? We track 89 published vulnerabilities listed under the name Windows 10 21H1, across 76 versions. The most recent Windows 10 21H1 flaw added to the known-exploited list is CVE-2022-38028, on 23 April 2024. ### Which Windows 10 21H1 vulnerabilities are being exploited? 44 are on the list of flaws known to be exploited. The most recently added are CVE-2022-38028, CVE-2023-36584 and CVE-2022-44698. ### Which versions of Windows 10 21H1 do the exploited flaws affect? Each flaw names its own versions, usually as ranges. The newest, CVE-2022-38028, affects before 10.0.19043.2130. The versions for every exploited flaw are listed on this page. ### How do I get alerts for Windows 10 21H1? Create a Precursor Intelligence account and track Windows 10 21H1. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook. ## Running Windows 10 21H1? 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