Microsoft · Security update · January 14, 2025

KB5049993: January 2025 cumulative update for Windows 10 1607

KB5049993, released January 14, 2025, fixes 112 CVEs across 8 products. None of them is reported as exploited. Patch Radar priority: Urgent.

Urgent1 publicly disclosed

CVEs closed

112

8 rated Critical

Exploited

None reported

Exploitation more likely

Microsoft's assessment

Highest EPSS

0.7437

99th percentile

Priority of the 112 CVEs

Patch now 0
                                Urgent 17
                                High 49
                                Routine 46

Applies to

Product	Build after install
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit Systems	14393.7699
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based Systems	14393.7699
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2016	14393.7699
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2016 (Server Core installation)	14393.7699
Windows 10 Version 1607 for 32-bit Systems	14393.7699
Windows 10 Version 1607 for x64-based Systems	14393.7699
Windows Server 2016	14393.7699
Windows Server 2016 (Server Core installation)	14393.7699

CVEs this fix closes

Priority	CVE	Component	Impact	CVSS	EPSS	Exploitation
Urgent	CVE-2025-21298	Windows OLE	Remote Code Execution	9.8	0.7437	More likely
Urgent	CVE-2025-21309	Windows Remote Desktop Services	Remote Code Execution	8.1	0.1506	More likely
Urgent	CVE-2025-21269	Windows MapUrlToZone	Security Feature Bypass	4.3	0.0450	More likely
Urgent	CVE-2025-21219	Windows MapUrlToZone	Security Feature Bypass	4.3	0.0295	More likely
Urgent	CVE-2025-21189	Windows MapUrlToZone	Security Feature Bypass	4.3	0.0291	More likely
Urgent	CVE-2025-21299	Windows Kerberos	Security Feature Bypass	7.1	0.0223	More likely
Urgent	CVE-2025-21268	Windows MapUrlToZone	Security Feature Bypass	4.3	0.0195	More likely
Urgent	CVE-2025-21307	Reliable Multicast Transport Driver (RMCAST)	Remote Code Execution	9.8	0.0194	Exploitation Less Likely
Urgent	CVE-2025-21295	Windows SPNEGO Extended Negotiation	Remote Code Execution	8.1	0.0163	Exploitation Less Likely
Urgent	CVE-2025-21328	Windows MapUrlToZone	Security Feature Bypass	4.3	0.0149	More likely
Urgent	CVE-2025-21329	Windows MapUrlToZone	Security Feature Bypass	4.3	0.0149	More likely
Urgent	CVE-2025-21297	Windows Remote Desktop Services	Remote Code Execution	8.1	0.0146	Exploitation Less Likely
Urgent	CVE-2025-21314	Windows SmartScreen	Spoofing	6.5	0.0139	More likely
Urgent	CVE-2025-21294	Microsoft Digest Authentication	Remote Code Execution	8.1	0.0123	Exploitation Less Likely
Urgent	CVE-2025-21210	Windows Virtual Trusted Platform Module	Information Disclosure	4.2	0.0112	More likely
Urgent	CVE-2024-49120	Windows Remote Desktop Services	Remote Code Execution	8.1	0.0110	Exploitation Less Likely
Urgent	CVE-2025-21296	BranchCache	Remote Code Execution	7.5	0.0079	Exploitation Less Likely
High	CVE-2025-21285	Windows Message Queuing	Denial of Service	7.5	0.5616	Exploitation Less Likely
High	CVE-2025-21277	Windows Message Queuing	Denial of Service	7.5	0.3906	Exploitation Less Likely
High	CVE-2025-21293	Active Directory Domain Services	Elevation of Privilege	8.8	0.1499	Exploitation Less Likely
High	CVE-2025-21230	Windows Message Queuing	Denial of Service	7.5	0.0272	Exploitation Less Likely
High	CVE-2025-21231	IP Helper	Denial of Service	7.5	0.0263	Exploitation Less Likely
High	CVE-2025-21251	Windows Message Queuing	Denial of Service	7.5	0.0263	Exploitation Less Likely
High	CVE-2025-21218	Windows Kerberos	Denial of Service	7.5	0.0263	Exploitation Less Likely
High	CVE-2025-21300	Windows UPnP Device Host	Denial of Service	7.5	0.0257	Exploitation Less Likely

Released the same day

KB5002595
Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition)
KB5002656
Microsoft Outlook 2016 (32-bit edition), Microsoft Outlook 2016 (64-bit edition)
KB5002666
Microsoft SharePoint Server 2019
KB5002667
Microsoft SharePoint Server 2019
KB5002670
Microsoft Access 2016 (32-bit edition), Microsoft Access 2016 (64-bit edition)
KB5002671
Microsoft SharePoint Enterprise Server 2016
KB5002672
Microsoft SharePoint Enterprise Server 2016
KB5002673
Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition)
KB5002675
Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition)
KB5002676
Microsoft SharePoint Server Subscription Edition
KB5002677
Office Online Server
KB5002688
Microsoft Access 2016 (32-bit edition), Microsoft Access 2016 (64-bit edition)

Vendor advisory

https://support.microsoft.com/help/5049993

For tools and AI agents

This page as data: JSON · Markdown

Link to this page

If this page saved you time, a link to it in your ticket, advisory or write-up helps others find it.

HTML

<a href="https://patchblox.com/security/fix/microsoft/kb5049993">KB5049993 on Patchblox Patch Radar</a>

Reusing the data? How to credit Patch Radar.

Which machines still need it?

Patchblox reads the OS build on every Windows machine, from Intune, ConfigMgr or its own agent, and shows which ones are still below the fixed build.

Get a demo

Patch Radar data is free to use with attribution. Terms and how to credit it.

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.