Microsoft · Security update · January 14, 2025

KB5050021: January 2025 cumulative update for Windows 11 22H2

KB5050021, released January 14, 2025, fixes 121 CVEs across 4 products. 3 of them are being exploited (CVE-2025-21333); 3 on CISA KEV. Patch Radar priority: Patch now.

Patch now3 on CISA KEV2 publicly disclosed
CVEs closed
121
5 rated Critical
Exploited
3
CVE-2025-21333
Exploitation more likely
11
Vendor assessment
Highest EPSS
0.7437
99th percentile

Priority of the 121 CVEs

Patch now 3 Urgent 15 High 57 Routine 46

Applies to

Product
Windows 11 Version 22H2 for ARM64-based Systems
Windows 11 Version 22H2 for x64-based Systems
Windows 11 Version 23H2 for ARM64-based Systems
Windows 11 Version 23H2 for x64-based Systems

CVEs this fix closes

PriorityCVEComponentImpactCVSSEPSSExploitation
Patch now CVE-2025-21333 Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege 7.8 0.1007 KEVExploited
Patch now CVE-2025-21334 Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege 7.8 0.0157 KEVExploited
Patch now CVE-2025-21335 Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege 7.8 0.0140 KEVExploited
Urgent CVE-2025-21298 Windows OLE Remote Code Execution 9.8 0.7437 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-2025-21314 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-2025-21292 Microsoft Windows Search Component Elevation of Privilege 8.8 0.0083 More 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-2025-21300 Windows UPnP Device Host Denial of Service 7.5 0.0257 Exploitation Less Likely
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