Microsoft · Security update · August 12, 2025

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.

Urgent

CVEs closed

3 rated Critical

Exploited

None reported

Exploitation more likely

Microsoft's assessment

Highest EPSS

0.5162

98th percentile

Priority of the 54 CVEs

Patch now 0
                                Urgent 7
                                High 35
                                Routine 12

Applies to

Product	Build after install
Windows 10 Version 1809 for 32-bit Systems	17763.7678
Windows 10 Version 1809 for x64-based Systems	17763.7678
Windows Server 2019	17763.7678
Windows Server 2019 (Server Core installation)	17763.7678

CVEs this fix closes

Priority	CVE	Component	Impact	CVSS	EPSS	Exploitation
Urgent	CVE-2025-53778	Windows NTLM	Elevation of Privilege	8.8	0.5162	More likely
Urgent	CVE-2025-53766	Windows GDI+	Remote Code Execution	9.8	0.0846	Exploitation Less Likely
Urgent	CVE-2025-50177	Windows Message Queuing	Remote Code Execution	8.1	0.0461	More likely
Urgent	CVE-2025-49743	Microsoft Graphics Component	Elevation of Privilege	6.7	0.0053	More likely
Urgent	CVE-2025-53132	Windows Win32K - GRFX	Elevation of Privilege	7.8	0.0046	More likely
Urgent	CVE-2025-53147	Windows Ancillary Function Driver for WinSock	Elevation of Privilege	7.0	0.0045	More likely
Urgent	CVE-2025-50167	Role: Windows Hyper-V	Elevation of Privilege	7.0	0.0038	More likely
High	CVE-2025-53722	Windows Remote Desktop Services	Denial of Service	7.5	0.2342	Exploitation Less Likely
High	CVE-2025-53143	Windows Message Queuing	Remote Code Execution	8.8	0.0903	Exploitation Less Likely
High	CVE-2025-53144	Windows Message Queuing	Remote Code Execution	8.8	0.0849	Exploitation Less Likely
High	CVE-2025-53145	Windows Message Queuing	Remote Code Execution	8.8	0.0849	Exploitation Less Likely
High	CVE-2025-53720	Windows Routing and Remote Access Service (RRAS)	Remote Code Execution	8.0	0.0098	Exploitation Unlikely
High	CVE-2025-50163	Windows Routing and Remote Access Service (RRAS)	Remote Code Execution	8.8	0.0097	Exploitation Unlikely
High	CVE-2025-53131	Windows Media	Remote Code Execution	8.8	0.0097	Exploitation Less Likely
High	CVE-2025-50160	Windows Routing and Remote Access Service (RRAS)	Remote Code Execution	8.0	0.0093	Exploitation Less Likely
High	CVE-2025-50162	Windows Routing and Remote Access Service (RRAS)	Remote Code Execution	8.0	0.0093	Exploitation Unlikely
High	CVE-2025-50164	Windows Routing and Remote Access Service (RRAS)	Remote Code Execution	8.0	0.0093	Exploitation Unlikely
High	CVE-2025-53149	Kernel Streaming WOW Thunk Service Driver	Elevation of Privilege	7.8	0.0077	Exploitation Less Likely
High	CVE-2025-50161	Windows Win32K - GRFX	Elevation of Privilege	7.3	0.0060	Exploitation Less Likely
High	CVE-2025-50159	Remote Access Point-to-Point Protocol (PPP) EAP-TLS	Elevation of Privilege	7.3	0.0059	Exploitation Less Likely
High	CVE-2025-50173	Windows Installer	Elevation of Privilege	7.8	0.0055	Exploitation Less Likely
High	CVE-2025-53155	Role: Windows Hyper-V	Elevation of Privilege	7.8	0.0049	Exploitation Less Likely
High	CVE-2025-53723	Role: Windows Hyper-V	Elevation of Privilege	7.8	0.0049	Exploitation Less Likely
High	CVE-2025-53152	Desktop Windows Manager	Remote Code Execution	7.8	0.0045	Exploitation Less Likely
High	CVE-2025-53724	Windows Push Notifications	Elevation of Privilege	7.8	0.0045	Exploitation Unlikely

Released the same day

KB5002765
Microsoft PowerPoint 2016 (32-bit edition), Microsoft PowerPoint 2016 (64-bit edition)
KB5002769
Microsoft SharePoint Server 2019
KB5002771
Microsoft SharePoint Enterprise Server 2016
KB5002773
Microsoft SharePoint Server Subscription Edition
KB5047155
Microsoft Exchange Server Subscription Edition RTM
KB5050672
Microsoft Exchange Server 2019 Cumulative Update 15
KB5050673
Microsoft Exchange Server 2019 Cumulative Update 14
KB5050674
Microsoft Exchange Server 2016 Cumulative Update 23
KB5059086
Microsoft Dynamics 365 (on-premises) version 9.1
KB5063221
Microsoft Exchange Server 2019 Cumulative Update 15
KB5063222
Microsoft Exchange Server 2019 Cumulative Update 14
KB5063223
Microsoft Exchange Server 2016 Cumulative Update 23

Vendor advisory

https://support.microsoft.com/help/5063877

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