# KB5078885: March 2026 cumulative update for Windows 10 21H2 KB5078885, released March 10, 2026, fixes 43 CVEs across 6 products. None of them is reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/fix/microsoft/kb5078885 - Platform: Microsoft - Released: Mar 10, 2026 - Priority: Urgent (Closes CVE-2026-24294, exploitation more likely) - CVEs: 43, exploited: 0, on CISA KEV: 0 - Vendor advisory: https://support.microsoft.com/help/5078885 ## Applies to | Product | Release | Fixed in | |---|---|---| | [Windows 10 Version 21H2 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-21h2-for-32-bit-systems.md) | | | | [Windows 10 Version 21H2 for ARM64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-21h2-for-arm64-based-systems.md) | | | | [Windows 10 Version 21H2 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-21h2-for-x64-based-systems.md) | | | | [Windows 10 Version 22H2 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-22h2-for-32-bit-systems.md) | | | | [Windows 10 Version 22H2 for ARM64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-22h2-for-arm64-based-systems.md) | | | | [Windows 10 Version 22H2 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-22h2-for-x64-based-systems.md) | | | ## CVEs this fix closes | CVE | Priority | Component | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2026-24294](https://patchblox.com/security/data/cve/CVE-2026-24294.md) | Urgent | Windows SMB Server | 7.8 | 0.0516 | More likely | | [CVE-2026-24289](https://patchblox.com/security/data/cve/CVE-2026-24289.md) | Urgent | Windows Kernel | 7.8 | 0.0488 | More likely | | [CVE-2026-23668](https://patchblox.com/security/data/cve/CVE-2026-23668.md) | Urgent | Microsoft Graphics Component | 7.0 | 0.0387 | More likely | | [CVE-2026-25187](https://patchblox.com/security/data/cve/CVE-2026-25187.md) | Urgent | Winlogon | 7.8 | 0.0341 | More likely | | [CVE-2026-24291](https://patchblox.com/security/data/cve/CVE-2026-24291.md) | Urgent | Windows Accessibility Infrastructure (ATBroker.exe) | 7.8 | 0.0334 | More likely | | [CVE-2026-26132](https://patchblox.com/security/data/cve/CVE-2026-26132.md) | Urgent | Windows Kernel | 7.8 | 0.0217 | More likely | | [CVE-2026-25181](https://patchblox.com/security/data/cve/CVE-2026-25181.md) | High | Windows GDI+ | 7.5 | 0.0157 | | | [CVE-2026-23674](https://patchblox.com/security/data/cve/CVE-2026-23674.md) | High | Windows MapUrlToZone | 7.5 | 0.0139 | | | [CVE-2026-25177](https://patchblox.com/security/data/cve/CVE-2026-25177.md) | High | Active Directory Domain Services | 8.8 | 0.0135 | | | [CVE-2026-23669](https://patchblox.com/security/data/cve/CVE-2026-23669.md) | High | RPC Runtime | 8.8 | 0.0104 | | | [CVE-2026-25172](https://patchblox.com/security/data/cve/CVE-2026-25172.md) | High | Windows Routing and Remote Access Service (RRAS) | 8.0 | 0.0100 | | | [CVE-2026-25173](https://patchblox.com/security/data/cve/CVE-2026-25173.md) | High | Windows Routing and Remote Access Service (RRAS) | 8.0 | 0.0100 | | | [CVE-2026-26111](https://patchblox.com/security/data/cve/CVE-2026-26111.md) | High | Windows Routing and Remote Access Service (RRAS) | 8.0 | 0.0090 | | | [CVE-2026-26128](https://patchblox.com/security/data/cve/CVE-2026-26128.md) | High | Windows SMB Server | 7.8 | 0.0069 | | | [CVE-2026-25188](https://patchblox.com/security/data/cve/CVE-2026-25188.md) | High | Windows Telephony Service | 8.8 | 0.0058 | | | [CVE-2026-24293](https://patchblox.com/security/data/cve/CVE-2026-24293.md) | High | Windows Ancillary Function Driver for WinSock | 7.8 | 0.0057 | | | [CVE-2026-25190](https://patchblox.com/security/data/cve/CVE-2026-25190.md) | High | Windows GDI | 7.8 | 0.0056 | | | [CVE-2026-24285](https://patchblox.com/security/data/cve/CVE-2026-24285.md) | High | Windows Win32K | 7.0 | 0.0046 | | | [CVE-2026-23673](https://patchblox.com/security/data/cve/CVE-2026-23673.md) | High | Windows Resilient File System (ReFS) | 7.8 | 0.0043 | | | [CVE-2026-25165](https://patchblox.com/security/data/cve/CVE-2026-25165.md) | High | Windows Performance Counters | 7.8 | 0.0043 | | | [CVE-2026-25176](https://patchblox.com/security/data/cve/CVE-2026-25176.md) | High | Windows Ancillary Function Driver for WinSock | 7.8 | 0.0042 | | | [CVE-2026-24292](https://patchblox.com/security/data/cve/CVE-2026-24292.md) | High | Connected Devices Platform Service (Cdpsvc) | 7.8 | 0.0039 | | | [CVE-2026-25174](https://patchblox.com/security/data/cve/CVE-2026-25174.md) | High | Windows Extensible File Allocation | 7.8 | 0.0039 | | | [CVE-2026-25175](https://patchblox.com/security/data/cve/CVE-2026-25175.md) | High | Windows NTFS | 7.8 | 0.0039 | | | [CVE-2026-23672](https://patchblox.com/security/data/cve/CVE-2026-23672.md) | High | Windows Universal Disk Format File System Driver (UDFS) | 7.8 | 0.0038 | | | [CVE-2026-24287](https://patchblox.com/security/data/cve/CVE-2026-24287.md) | High | Windows Kernel | 7.8 | 0.0038 | | | [CVE-2026-25189](https://patchblox.com/security/data/cve/CVE-2026-25189.md) | High | Windows DWM Core Library | 7.8 | 0.0038 | | | [CVE-2026-24290](https://patchblox.com/security/data/cve/CVE-2026-24290.md) | High | Windows Projected File System | 7.8 | 0.0037 | | | [CVE-2026-25179](https://patchblox.com/security/data/cve/CVE-2026-25179.md) | High | Windows Ancillary Function Driver for WinSock | 7.0 | 0.0037 | | | [CVE-2026-23667](https://patchblox.com/security/data/cve/CVE-2026-23667.md) | High | Broadcast DVR | 7.0 | 0.0033 | | | [CVE-2026-25171](https://patchblox.com/security/data/cve/CVE-2026-25171.md) | High | Windows Authentication Methods | 7.0 | 0.0031 | | | [CVE-2026-25178](https://patchblox.com/security/data/cve/CVE-2026-25178.md) | High | Windows Ancillary Function Driver for WinSock | 7.0 | 0.0031 | | | [CVE-2026-23671](https://patchblox.com/security/data/cve/CVE-2026-23671.md) | High | Windows Bluetooth RFCOM Protocol Driver | 7.0 | 0.0024 | | | [CVE-2026-24295](https://patchblox.com/security/data/cve/CVE-2026-24295.md) | High | Windows Device Association Service | 7.0 | 0.0024 | | | [CVE-2026-24296](https://patchblox.com/security/data/cve/CVE-2026-24296.md) | High | Windows Device Association Service | 7.0 | 0.0024 | | | [CVE-2026-25185](https://patchblox.com/security/data/cve/CVE-2026-25185.md) | Routine | Windows Shell Link Processing | 5.3 | 0.0109 | | | [CVE-2026-25180](https://patchblox.com/security/data/cve/CVE-2026-25180.md) | Routine | Microsoft Graphics Component | 5.5 | 0.0074 | | | [CVE-2026-25186](https://patchblox.com/security/data/cve/CVE-2026-25186.md) | Routine | Windows Accessibility Infrastructure (ATBroker.exe) | 5.5 | 0.0069 | | | [CVE-2026-25168](https://patchblox.com/security/data/cve/CVE-2026-25168.md) | Routine | Microsoft Graphics Component | 6.2 | 0.0052 | | | [CVE-2026-24288](https://patchblox.com/security/data/cve/CVE-2026-24288.md) | Routine | Windows Mobile Broadband | 6.8 | 0.0050 | | | [CVE-2026-24282](https://patchblox.com/security/data/cve/CVE-2026-24282.md) | Routine | Push Message Routing Service | 5.5 | 0.0049 | | | [CVE-2026-25169](https://patchblox.com/security/data/cve/CVE-2026-25169.md) | Routine | Microsoft Graphics Component | 6.2 | 0.0049 | | | [CVE-2026-24297](https://patchblox.com/security/data/cve/CVE-2026-24297.md) | Routine | Windows Kerberos | 6.5 | 0.0039 | | --- Data as of 2026-11-07T18:46:35Z UTC. 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