# Windows Server 20H2 vulnerabilities > Windows Server 20H2 is made by Microsoft. We track 52 published vulnerabilities in it, across 15 versions. 35 of them are on the list of flaws known to be exploited, the newest added on 18 August 2022. If you run Windows Server 20H2, check your version against the exploited flaws below and patch those first. Canonical page: https://www.precursorintelligence.com/product/microsoft/windows_server_20h2 ## At a glance - **Made by:** [Microsoft](https://www.precursorintelligence.com/vendors/microsoft) - **Published vulnerabilities:** 52 - **Known to be exploited:** 35 - **Versions tracked:** 15 - **Most recently added to the known-exploited list:** [CVE-2022-21971](https://www.precursorintelligence.com/what-is/cve-2022-21971), 18 August 2022. We keep watching the list. ## Which versions of Windows Server 20H2 do the exploited flaws hit? Each exploited flaw lists the versions it affects, as published. "before 10.0.19042.1526" means every version up to, but not including, 10.0.19042.1526. - [CVE-2022-21971](https://www.precursorintelligence.com/what-is/cve-2022-21971) (Microsoft Windows Runtime Remote Code Execution Vulnerability): before 10.0.19042.1526 - [CVE-2022-34713](https://www.precursorintelligence.com/what-is/cve-2022-34713) (Microsoft Windows Support Diagnostic Tool (MSDT) Remote Code Execution Vulnerability): before 10.0.19042.1889 - [CVE-2022-22047](https://www.precursorintelligence.com/what-is/cve-2022-22047) (Microsoft Windows Client Server Runtime Subsystem (CSRSS) Privilege Escalation Vulnerability): before 10.0.19042.1826 - [CVE-2022-26925](https://www.precursorintelligence.com/what-is/cve-2022-26925) (Microsoft Windows LSA Spoofing Vulnerability): before 10.0.19042.1706 - [CVE-2022-30190](https://www.precursorintelligence.com/what-is/cve-2022-30190) (Microsoft Windows Support Diagnostic Tool (MSDT) Remote Code Execution Vulnerability): before 10.0.19042.1766 - [CVE-2022-26904](https://www.precursorintelligence.com/what-is/cve-2022-26904) (Microsoft Windows User Profile Service Privilege Escalation Vulnerability): before 10.0.19042.1645 - [CVE-2021-40450](https://www.precursorintelligence.com/what-is/cve-2021-40450) (Microsoft Win32k Privilege Escalation Vulnerability): before 10.0.19042.1288 - [CVE-2021-41357](https://www.precursorintelligence.com/what-is/cve-2021-41357) (Microsoft Win32k Privilege Escalation Vulnerability): before 10.0.19042.1288 - [CVE-2022-21919](https://www.precursorintelligence.com/what-is/cve-2022-21919) (Microsoft Windows User Profile Service Privilege Escalation Vulnerability): before 10.0.19042.1466 - [CVE-2022-22718](https://www.precursorintelligence.com/what-is/cve-2022-22718) (Microsoft Windows Print Spooler Privilege Escalation Vulnerability): before 10.0.19042.1526 - [CVE-2022-24521](https://www.precursorintelligence.com/what-is/cve-2022-24521) (Microsoft Windows CLFS Driver Privilege Escalation Vulnerability): before 10.0.19042.1645 - [CVE-2021-42278](https://www.precursorintelligence.com/what-is/cve-2021-42278) (Microsoft Active Directory Domain Services Privilege Escalation Vulnerability): before 10.0.19042.1348 - [CVE-2021-31166](https://www.precursorintelligence.com/what-is/cve-2021-31166) (Microsoft HTTP Protocol Stack Remote Code Execution Vulnerability): before 10.0.19042.982 - [CVE-2021-34484](https://www.precursorintelligence.com/what-is/cve-2021-34484) (Microsoft Windows User Profile Service Privilege Escalation Vulnerability): before 10.0.19042.1165 - [CVE-2021-34486](https://www.precursorintelligence.com/what-is/cve-2021-34486) (Microsoft Windows Event Tracing Privilege Escalation Vulnerability): before 10.0.19042.1165 - [CVE-2022-21999](https://www.precursorintelligence.com/what-is/cve-2022-21999) (Microsoft Windows Print Spooler Privilege Escalation Vulnerability): before 10.0.19042.1526 - [CVE-2021-41379](https://www.precursorintelligence.com/what-is/cve-2021-41379) (Microsoft Windows Installer Privilege Escalation Vulnerability): before 10.0.19042.1348 - [CVE-2022-21882](https://www.precursorintelligence.com/what-is/cve-2022-21882) (Microsoft Win32k Privilege Escalation Vulnerability): before 10.0.19042.1466 - [CVE-2021-40449](https://www.precursorintelligence.com/what-is/cve-2021-40449) (Microsoft Windows Win32k Privilege Escalation Vulnerability): before 10.0.19042.1288 - [CVE-2021-36955](https://www.precursorintelligence.com/what-is/cve-2021-36955) (Microsoft Windows Common Log File System (CLFS) Driver Privilege Escalation Vulnerability): before 10.0.19042.1237 - [CVE-2021-31199](https://www.precursorintelligence.com/what-is/cve-2021-31199) (Microsoft Enhanced Cryptographic Provider Privilege Escalation Vulnerability): before 10.0.19042.1052 - [CVE-2021-31201](https://www.precursorintelligence.com/what-is/cve-2021-31201) (Microsoft Enhanced Cryptographic Provider Privilege Escalation Vulnerability): before 10.0.19042.1052 - [CVE-2021-31955](https://www.precursorintelligence.com/what-is/cve-2021-31955) (Microsoft Windows Kernel Information Disclosure Vulnerability): before 10.0.19042.1052 - [CVE-2021-31956](https://www.precursorintelligence.com/what-is/cve-2021-31956) (Microsoft Windows NTFS Privilege Escalation Vulnerability): before 10.0.19042.1052 - [CVE-2021-31979](https://www.precursorintelligence.com/what-is/cve-2021-31979) (Microsoft Windows Kernel Privilege Escalation Vulnerability): before 10.0.19042.1110 - [CVE-2021-33739](https://www.precursorintelligence.com/what-is/cve-2021-33739) (Microsoft Desktop Window Manager (DWM) Core Library Privilege Escalation Vulnerability): before 10.0.19042.1052 - [CVE-2021-33771](https://www.precursorintelligence.com/what-is/cve-2021-33771) (Microsoft Windows Kernel Privilege Escalation Vulnerability): before 10.0.19042.1110 3 more exploited flaws name Windows Server 20H2 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 35 exploited flaws. ## Which Windows Server 20H2 vulnerabilities are being exploited? 35 flaws are on the government list of vulnerabilities known to be exploited, newest first: - [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-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-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-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-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-2021-42278](https://www.precursorintelligence.com/what-is/cve-2021-42278): Microsoft Active Directory Domain Services Privilege Escalation Vulnerability. High, CVSS 7.5, chance of use in 30 days 73%, known exploited since 11 April 2022. - [CVE-2021-31166](https://www.precursorintelligence.com/what-is/cve-2021-31166): Microsoft HTTP Protocol Stack Remote Code Execution Vulnerability. Critical, CVSS 9.8, chance of use in 30 days >99%, known exploited since 6 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-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-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-2021-36955](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-2021-1647](https://www.precursorintelligence.com/what-is/cve-2021-1647): Microsoft Defender Remote Code Execution Vulnerability. High, CVSS 7.8, chance of use in 30 days 39%, known exploited since 3 November 2021. - [CVE-2021-1732](https://www.precursorintelligence.com/what-is/cve-2021-1732): Microsoft Win32k Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 78%, known exploited since 3 November 2021. - [CVE-2021-28310](https://www.precursorintelligence.com/what-is/cve-2021-28310): Microsoft Win32k Privilege Escalation Vulnerability. High, CVSS 7.8, chance of use in 30 days 8.4%, 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-2021-31201](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-2021-31955](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-2021-31956](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-2021-31979](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-2021-33739](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-2021-33771](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-2021-34527](https://www.precursorintelligence.com/what-is/cve-2021-34527): Microsoft Windows Print Spooler Remote Code Execution Vulnerability. High, CVSS 8.8, chance of use in 30 days >99%, known exploited since 3 November 2021. - [CVE-2021-36942](https://www.precursorintelligence.com/what-is/cve-2021-36942): Microsoft Windows Local Security Authority (LSA) Spoofing Vulnerability. High, CVSS 7.5, chance of use in 30 days 66%, 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-2020-1472](https://www.precursorintelligence.com/what-is/cve-2020-1472): Microsoft Netlogon Privilege Escalation Vulnerability. Medium, CVSS 5.5, chance of use in 30 days >99%, known exploited since 3 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. ## Which Windows Server 20H2 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-2021-31166](https://www.precursorintelligence.com/what-is/cve-2021-31166): >99%, Critical (CVSS 9.8), known exploited - [CVE-2021-34527](https://www.precursorintelligence.com/what-is/cve-2021-34527): >99%, High (CVSS 8.8), known exploited - [CVE-2020-1472](https://www.precursorintelligence.com/what-is/cve-2020-1472): >99%, Medium (CVSS 5.5), known exploited - [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-2021-31955](https://www.precursorintelligence.com/what-is/cve-2021-31955): 81%, Medium (CVSS 5.5), known exploited - [CVE-2021-1732](https://www.precursorintelligence.com/what-is/cve-2021-1732): 78%, High (CVSS 7.8), known exploited - [CVE-2021-40449](https://www.precursorintelligence.com/what-is/cve-2021-40449): 74%, High (CVSS 7.8), known exploited - [CVE-2021-42278](https://www.precursorintelligence.com/what-is/cve-2021-42278): 73%, High (CVSS 7.5), known exploited - [CVE-2022-34713](https://www.precursorintelligence.com/what-is/cve-2022-34713): 68%, High (CVSS 7.8), known exploited ## Questions ### How many vulnerabilities does Windows Server 20H2 have? We track 52 published vulnerabilities listed under the name Windows Server 20H2, across 15 versions. The most recent Windows Server 20H2 flaw added to the known-exploited list is CVE-2022-21971, on 18 August 2022. ### Which Windows Server 20H2 vulnerabilities are being exploited? 35 are on the list of flaws known to be exploited. The most recently added are CVE-2022-21971, CVE-2022-34713 and CVE-2022-22047. ### Which versions of Windows Server 20H2 do the exploited flaws affect? Each flaw names its own versions, usually as ranges. The newest, CVE-2022-21971, affects before 10.0.19042.1526. The versions for every exploited flaw are listed on this page. ### How do I get alerts for Windows Server 20H2? Create a Precursor Intelligence account and track Windows Server 20H2. 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 Server 20H2? 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