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Microsoft Patch Tuesday, January 2025

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Microsoft's January 2025 security release, published January 14, 2025: 47 updates fixing 148 CVEs, ranked by confirmed exploitation, ransomware use, and severity. Provided by Senserva.

47
Updates (KBs)
148
CVEs fixed
3
On the CISA KEV list
15
Critical updates

Actively exploited CVEs (CISA KEV)

CVE-2025-21335Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege VulnerabilityCVSS 7.8Exploited
CVE-2025-21333Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege VulnerabilityCVSS 7.8Exploited
CVE-2025-21334Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege VulnerabilityCVSS 7.8Exploited

Other high-risk CVEs (CVSS 8.8+)

CVE-2025-21298Windows OLE Remote Code Execution VulnerabilityCVSS 9.8
CVE-2025-21307Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution VulnerabilityCVSS 9.8
CVE-2025-21311Windows NTLM V1 Elevation of Privilege VulnerabilityCVSS 9.8
CVE-2025-21411Windows Telephony Service Remote Code Execution VulnerabilityCVSS 8.8
CVE-2025-21413Windows Telephony Service Remote Code Execution VulnerabilityCVSS 8.8
CVE-2025-21233Windows Telephony Service Remote Code Execution VulnerabilityCVSS 8.8
CVE-2025-21236Windows Telephony Service Remote Code Execution VulnerabilityCVSS 8.8
CVE-2025-21237Windows Telephony Service Remote Code Execution VulnerabilityCVSS 8.8
CVE-2025-21239Windows Telephony Service Remote Code Execution VulnerabilityCVSS 8.8
CVE-2025-21241Windows Telephony Service Remote Code Execution VulnerabilityCVSS 8.8
CVE-2025-21243Windows Telephony Service Remote Code Execution VulnerabilityCVSS 8.8
CVE-2025-21244Windows Telephony Service Remote Code Execution VulnerabilityCVSS 8.8

Products fixed this month

Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8) (16)Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10) (16)Microsoft Visual Studio 2022 version 17.6 (16)Windows 10 Version 1809 for 32-bit Systems (15)Windows 10 Version 1809 for x64-based Systems (14)Windows Server 2019 (14)Microsoft Office 2019 for 32-bit editions (7)Microsoft Office 2019 for 64-bit editions (7)Microsoft SharePoint Enterprise Server 2016 (5)Microsoft SharePoint Server 2019 (5)

Every update in this release

All 44 update articles, worst first: anything on the CISA KEV list, then by highest CVSS. Each row links our page for the update, Microsoft's support article, and the Update Catalog for a standalone download.

UpdateSeverityMax CVSSCVEs fixedProductsAlso
KB5049981 ExploitedCritical9.8121Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019Support · Catalog
KB5050021 ExploitedCritical9.8121Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019Support · Catalog
KB5050009 ExploitedCritical9.8128Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019Support · Catalog
KB5049984 ExploitedCritical9.8128Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019Support · Catalog
KB5050008Critical9.8118Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019Support · Catalog
KB5049983Critical9.8122Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019Support · Catalog
KB5050013Critical9.8103Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019Support · Catalog
KB5049993Critical9.8112Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019Support · Catalog
KB5050063Critical9.873Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019Support · Catalog
KB5050061Critical9.866Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019Support · Catalog
KB5050049Critical9.878Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019Support · Catalog
KB5050006Critical9.871Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019Support · Catalog
KB5050004Critical9.893Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019Support · Catalog
KB5050048Critical9.896Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019Support · Catalog
KB5050526High8.84PowerShell 7.5 installed on Windows, PowerShell 7.5 installed on Linux, PowerShell 7.5 installed on MacOSSupport · Catalog
KB5049688High8.83Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2022 version 17.6Support · Catalog
KB5050525High8.83Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2022 version 17.6Support · Catalog
KB5049622High8.81Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2022 version 17.6Support · Catalog
KB5049614High8.81Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2022 version 17.6Support · Catalog
KB5050183High8.81Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2022 version 17.6Support · Catalog
KB5050180High8.81Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2022 version 17.6Support · Catalog
KB5050184High8.81Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2022 version 17.6Support · Catalog
KB5050185High8.81Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2022 version 17.6Support · Catalog
KB5050182High8.81Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2022 version 17.6Support · Catalog
KB5050187High8.81Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2022 version 17.6Support · Catalog
KB5050416High8.81Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2022 version 17.6Support · Catalog
KB5050188High8.81Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2022 version 17.6Support · Catalog
KB5049624High8.81Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2022 version 17.6Support · Catalog
KB5049620High8.81Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2022 version 17.6Support · Catalog
KB5050186High8.81Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2022 version 17.6Support · Catalog
KB5050181High8.81Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2022 version 17.6Support · Catalog
KB5002677High8.42Office Online Server, Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editionsSupport · Catalog
KB5002673High8.41Office Online Server, Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editionsSupport · Catalog
KB5002672High7.83Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription EditionSupport · Catalog
KB5002671High7.83Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription EditionSupport · Catalog
KB5002666High7.83Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription EditionSupport · Catalog
KB5002667High7.83Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription EditionSupport · Catalog
KB5002676High7.83Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription EditionSupport · Catalog
KB5002670High7.82Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit SystemsSupport · Catalog
KB5002688High7.81Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit SystemsSupport · Catalog
KB5049994High7.57Windows Server 2025 (Server Core installation), Windows Server 2025, Windows 10 Version 1809 for 32-bit SystemsSupport · Catalog
KB5002675High7.11Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit SystemsSupport · Catalog
KB5002595High7.11Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit SystemsSupport · Catalog
KB5002656Medium6.71Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit SystemsSupport · Catalog
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Reference: Microsoft CVE and vulnerability management, ranked by real-world risk, and the Microsoft patching guide.
Data notice: this page is provided as is, for informational purposes only, without warranty of any kind. Senserva, LLC does not guarantee the accuracy, completeness, or timeliness of third-party data (MSRC, NVD, CISA KEV, EPSS) and accepts no liability for actions taken based on it; verify against the authoritative Microsoft advisory before acting. Built daily with Senserva Trustworthy AI. All use of this data is subject to the Senserva EULA.