# KB5063877: August 2025 cumulative update for Windows 10 1809 KB5063877, released August 12, 2025, fixes 54 CVEs across 4 products. None of them is reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/fix/microsoft/kb5063877 - Platform: Microsoft - Released: Aug 12, 2025 - Priority: Urgent (Closes CVE-2025-53778, exploitation more likely) - CVEs: 54, exploited: 0, on CISA KEV: 0 - Vendor advisory: https://support.microsoft.com/help/5063877 ## Applies to | Product | Release | Fixed in | |---|---|---| | [Windows 10 Version 1809 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1809-for-32-bit-systems.md) | | 17763.7678 | | [Windows 10 Version 1809 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1809-for-x64-based-systems.md) | | 17763.7678 | | [Windows Server 2019](https://patchblox.com/security/data/product/microsoft/windows-server-2019.md) | | 17763.7678 | | [Windows Server 2019 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-2019-server-core-installation.md) | | 17763.7678 | ## CVEs this fix closes | CVE | Priority | Component | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2025-53778](https://patchblox.com/security/data/cve/CVE-2025-53778.md) | Urgent | Windows NTLM | 8.8 | 0.5162 | More likely | | [CVE-2025-53766](https://patchblox.com/security/data/cve/CVE-2025-53766.md) | Urgent | Windows GDI+ | 9.8 | 0.0846 | | | [CVE-2025-50177](https://patchblox.com/security/data/cve/CVE-2025-50177.md) | Urgent | Windows Message Queuing | 8.1 | 0.0461 | More likely | | [CVE-2025-49743](https://patchblox.com/security/data/cve/CVE-2025-49743.md) | Urgent | Microsoft Graphics Component | 6.7 | 0.0053 | More likely | | [CVE-2025-53132](https://patchblox.com/security/data/cve/CVE-2025-53132.md) | Urgent | Windows Win32K - GRFX | 7.8 | 0.0046 | More likely | | [CVE-2025-53147](https://patchblox.com/security/data/cve/CVE-2025-53147.md) | Urgent | Windows Ancillary Function Driver for WinSock | 7.0 | 0.0045 | More likely | | [CVE-2025-50167](https://patchblox.com/security/data/cve/CVE-2025-50167.md) | Urgent | Role: Windows Hyper-V | 7.0 | 0.0038 | More likely | | [CVE-2025-53722](https://patchblox.com/security/data/cve/CVE-2025-53722.md) | High | Windows Remote Desktop Services | 7.5 | 0.2342 | | | [CVE-2025-53143](https://patchblox.com/security/data/cve/CVE-2025-53143.md) | High | Windows Message Queuing | 8.8 | 0.0903 | | | [CVE-2025-53144](https://patchblox.com/security/data/cve/CVE-2025-53144.md) | High | Windows Message Queuing | 8.8 | 0.0849 | | | [CVE-2025-53145](https://patchblox.com/security/data/cve/CVE-2025-53145.md) | High | Windows Message Queuing | 8.8 | 0.0849 | | | [CVE-2025-53720](https://patchblox.com/security/data/cve/CVE-2025-53720.md) | High | Windows Routing and Remote Access Service (RRAS) | 8.0 | 0.0098 | | | [CVE-2025-50163](https://patchblox.com/security/data/cve/CVE-2025-50163.md) | High | Windows Routing and Remote Access Service (RRAS) | 8.8 | 0.0097 | | | [CVE-2025-53131](https://patchblox.com/security/data/cve/CVE-2025-53131.md) | High | Windows Media | 8.8 | 0.0097 | | | [CVE-2025-50160](https://patchblox.com/security/data/cve/CVE-2025-50160.md) | High | Windows Routing and Remote Access Service (RRAS) | 8.0 | 0.0093 | | | [CVE-2025-50162](https://patchblox.com/security/data/cve/CVE-2025-50162.md) | High | Windows Routing and Remote Access Service (RRAS) | 8.0 | 0.0093 | | | [CVE-2025-50164](https://patchblox.com/security/data/cve/CVE-2025-50164.md) | High | Windows Routing and Remote Access Service (RRAS) | 8.0 | 0.0093 | | | [CVE-2025-53149](https://patchblox.com/security/data/cve/CVE-2025-53149.md) | High | Kernel Streaming WOW Thunk Service Driver | 7.8 | 0.0077 | | | [CVE-2025-50161](https://patchblox.com/security/data/cve/CVE-2025-50161.md) | High | Windows Win32K - GRFX | 7.3 | 0.0060 | | | [CVE-2025-50159](https://patchblox.com/security/data/cve/CVE-2025-50159.md) | High | Remote Access Point-to-Point Protocol (PPP) EAP-TLS | 7.3 | 0.0059 | | | [CVE-2025-50173](https://patchblox.com/security/data/cve/CVE-2025-50173.md) | High | Windows Installer | 7.8 | 0.0055 | | | [CVE-2025-53155](https://patchblox.com/security/data/cve/CVE-2025-53155.md) | High | Role: Windows Hyper-V | 7.8 | 0.0049 | | | [CVE-2025-53723](https://patchblox.com/security/data/cve/CVE-2025-53723.md) | High | Role: Windows Hyper-V | 7.8 | 0.0049 | | | [CVE-2025-53152](https://patchblox.com/security/data/cve/CVE-2025-53152.md) | High | Desktop Windows Manager | 7.8 | 0.0045 | | | [CVE-2025-53724](https://patchblox.com/security/data/cve/CVE-2025-53724.md) | High | Windows Push Notifications | 7.8 | 0.0045 | | | [CVE-2025-53726](https://patchblox.com/security/data/cve/CVE-2025-53726.md) | High | Windows Push Notifications | 7.8 | 0.0045 | | | [CVE-2025-49761](https://patchblox.com/security/data/cve/CVE-2025-49761.md) | High | Windows Kernel | 7.8 | 0.0044 | | | [CVE-2025-50153](https://patchblox.com/security/data/cve/CVE-2025-50153.md) | High | Desktop Windows Manager | 7.8 | 0.0044 | | | [CVE-2025-50155](https://patchblox.com/security/data/cve/CVE-2025-50155.md) | High | Windows Push Notifications | 7.8 | 0.0044 | | | [CVE-2025-53141](https://patchblox.com/security/data/cve/CVE-2025-53141.md) | High | Windows Ancillary Function Driver for WinSock | 7.8 | 0.0044 | | | [CVE-2025-53151](https://patchblox.com/security/data/cve/CVE-2025-53151.md) | High | Windows Kernel | 7.8 | 0.0044 | | | [CVE-2025-53154](https://patchblox.com/security/data/cve/CVE-2025-53154.md) | High | Windows Ancillary Function Driver for WinSock | 7.8 | 0.0044 | | | [CVE-2025-53725](https://patchblox.com/security/data/cve/CVE-2025-53725.md) | High | Windows Push Notifications | 7.8 | 0.0044 | | | [CVE-2025-50170](https://patchblox.com/security/data/cve/CVE-2025-50170.md) | High | Windows Cloud Files Mini Filter Driver | 7.8 | 0.0040 | | | [CVE-2025-53137](https://patchblox.com/security/data/cve/CVE-2025-53137.md) | High | Windows Ancillary Function Driver for WinSock | 7.0 | 0.0039 | | | [CVE-2025-50158](https://patchblox.com/security/data/cve/CVE-2025-50158.md) | High | Windows NTFS | 7.0 | 0.0039 | | | [CVE-2025-53718](https://patchblox.com/security/data/cve/CVE-2025-53718.md) | High | Windows Ancillary Function Driver for WinSock | 7.0 | 0.0036 | | | [CVE-2025-53140](https://patchblox.com/security/data/cve/CVE-2025-53140.md) | High | Kernel Transaction Manager | 7.0 | 0.0036 | | | [CVE-2025-53721](https://patchblox.com/security/data/cve/CVE-2025-53721.md) | High | Windows Connected Devices Platform Service | 7.0 | 0.0036 | | | [CVE-2025-53134](https://patchblox.com/security/data/cve/CVE-2025-53134.md) | High | Windows Ancillary Function Driver for WinSock | 7.0 | 0.0032 | | | [CVE-2025-49762](https://patchblox.com/security/data/cve/CVE-2025-49762.md) | High | Windows Ancillary Function Driver for WinSock | 7.0 | 0.0027 | | | [CVE-2025-53135](https://patchblox.com/security/data/cve/CVE-2025-53135.md) | High | Windows DirectX | 7.0 | 0.0027 | | | [CVE-2025-50154](https://patchblox.com/security/data/cve/CVE-2025-50154.md) | Routine | Windows File Explorer | 6.5 | 0.3177 | | | [CVE-2025-50172](https://patchblox.com/security/data/cve/CVE-2025-50172.md) | Routine | Windows DirectX | 6.5 | 0.0155 | | | [CVE-2025-53716](https://patchblox.com/security/data/cve/CVE-2025-53716.md) | Routine | Windows Local Security Authority Subsystem Service (LSASS) | 6.5 | 0.0155 | | | [CVE-2025-50166](https://patchblox.com/security/data/cve/CVE-2025-50166.md) | Routine | Windows Distributed Transaction Coordinator | 6.5 | 0.0141 | | | [CVE-2025-53719](https://patchblox.com/security/data/cve/CVE-2025-53719.md) | Routine | Windows Routing and Remote Access Service (RRAS) | 5.7 | 0.0133 | | | [CVE-2025-50156](https://patchblox.com/security/data/cve/CVE-2025-50156.md) | Routine | Windows Routing and Remote Access Service (RRAS) | 5.7 | 0.0125 | | | [CVE-2025-50157](https://patchblox.com/security/data/cve/CVE-2025-50157.md) | Routine | Windows Routing and Remote Access Service (RRAS) | 5.7 | 0.0123 | | | [CVE-2025-53138](https://patchblox.com/security/data/cve/CVE-2025-53138.md) | Routine | Windows Routing and Remote Access Service (RRAS) | 5.7 | 0.0123 | | | [CVE-2025-53148](https://patchblox.com/security/data/cve/CVE-2025-53148.md) | Routine | Windows Routing and Remote Access Service (RRAS) | 5.7 | 0.0123 | | | [CVE-2025-53153](https://patchblox.com/security/data/cve/CVE-2025-53153.md) | Routine | Windows Routing and Remote Access Service (RRAS) | 5.7 | 0.0123 | | | [CVE-2025-53136](https://patchblox.com/security/data/cve/CVE-2025-53136.md) | Routine | Windows NT OS Kernel | 5.5 | 0.0098 | | | [CVE-2025-49751](https://patchblox.com/security/data/cve/CVE-2025-49751.md) | Routine | Role: Windows Hyper-V | 6.8 | 0.0054 | | --- Data as of 2026-11-07T06:34:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo