Microsoft · ServicingStack update · March 10, 2026

KB5078766: March 2026 cumulative update for Windows Server 23H2

KB5078766, released March 10, 2026, fixes 40 CVEs across 2 products. None of them is reported as exploited. Patch Radar priority: Urgent.

Urgent
CVEs closed
40
None rated Critical
Exploited
0
None reported
Exploitation more likely
6
Vendor assessment
Highest EPSS
0.0516
92nd percentile

Priority of the 40 CVEs

Patch now 0 Urgent 6 High 29 Routine 5

Applies to

ProductBuild after install
Windows Server 202220348.4893
Windows Server 2022 (Server Core installation)20348.4893

CVEs this fix closes

PriorityCVEComponentImpactCVSSEPSSExploitation
Urgent CVE-2026-24294 Windows SMB Server Elevation of Privilege 7.8 0.0516 More likely
Urgent CVE-2026-24289 Windows Kernel Elevation of Privilege 7.8 0.0488 More likely
Urgent CVE-2026-23668 Microsoft Graphics Component Elevation of Privilege 7.0 0.0387 More likely
Urgent CVE-2026-25187 Winlogon Elevation of Privilege 7.8 0.0341 More likely
Urgent CVE-2026-24291 Windows Accessibility Infrastructure (ATBroker.exe) Elevation of Privilege 7.8 0.0334 More likely
Urgent CVE-2026-26132 Windows Kernel Elevation of Privilege 7.8 0.0217 More likely
High CVE-2026-25181 Windows GDI+ Information Disclosure 7.5 0.0157 Exploitation Less Likely
High CVE-2026-23674 Windows MapUrlToZone Security Feature Bypass 7.5 0.0139 Exploitation Unlikely
High CVE-2026-25177 Active Directory Domain Services Elevation of Privilege 8.8 0.0135 Exploitation Less Likely
High CVE-2026-23669 RPC Runtime Remote Code Execution 8.8 0.0104 Exploitation Less Likely
High CVE-2026-25172 Windows Routing and Remote Access Service (RRAS) Remote Code Execution 8.0 0.0100 Exploitation Less Likely
High CVE-2026-25173 Windows Routing and Remote Access Service (RRAS) Remote Code Execution 8.0 0.0100 Exploitation Less Likely
High CVE-2026-26111 Windows Routing and Remote Access Service (RRAS) Remote Code Execution 8.0 0.0090 Exploitation Less Likely
High CVE-2026-26128 Windows SMB Server Elevation of Privilege 7.8 0.0069 Exploitation Less Likely
High CVE-2026-25188 Windows Telephony Service Elevation of Privilege 8.8 0.0058 Exploitation Unlikely
High CVE-2026-24293 Windows Ancillary Function Driver for WinSock Elevation of Privilege 7.8 0.0057 Exploitation Less Likely
High CVE-2026-25190 Windows GDI Remote Code Execution 7.8 0.0056 Exploitation Less Likely
High CVE-2026-24285 Windows Win32K Elevation of Privilege 7.0 0.0046 Exploitation Less Likely
High CVE-2026-23673 Windows Resilient File System (ReFS) Elevation of Privilege 7.8 0.0043 Exploitation Unlikely
High CVE-2026-25165 Windows Performance Counters Elevation of Privilege 7.8 0.0043 Exploitation Unlikely
High CVE-2026-25176 Windows Ancillary Function Driver for WinSock Elevation of Privilege 7.8 0.0042 Exploitation Less Likely
High CVE-2026-24292 Connected Devices Platform Service (Cdpsvc) Elevation of Privilege 7.8 0.0039 Exploitation Less Likely
High CVE-2026-25174 Windows Extensible File Allocation Elevation of Privilege 7.8 0.0039 Exploitation Unlikely
High CVE-2026-25175 Windows NTFS Elevation of Privilege 7.8 0.0039 Exploitation Less Likely
High CVE-2026-23672 Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege 7.8 0.0038 Exploitation Unlikely
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