Microsoft · Security update · August 8, 2023

KB5029253: August 2023 cumulative update for Windows 11 21H2

KB5029253, released August 8, 2023, fixes 34 CVEs across 2 products. One of them is being exploited (CVE-2023-36884); 1 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.

Patch now1 on CISA KEVKnown ransomware use1 publicly disclosedUnsupported product

CVEs closed

3 rated Critical

Exploited

CVE-2023-36884

Exploitation more likely

Microsoft's assessment

Highest EPSS

0.9944

99th percentile

Priority of the 34 CVEs

Patch now 1
                                Urgent 9
                                High 12
                                Routine 12

Applies to

Product	Build after install
Windows 11 version 21H2 for ARM64-based Systems	22000.2295
Windows 11 version 21H2 for x64-based Systems	22000.2295

CVEs this fix closes

Priority	CVE	Component	Impact	CVSS	EPSS	Exploitation
Patch now	CVE-2023-36884	Microsoft Windows Search Component	Remote Code Execution	7.5	0.9944	KEVRansomwareDisclosedExploited
Urgent	CVE-2023-36900	Windows Common Log File System Driver	Elevation of Privilege	7.8	0.1017	More likely
Urgent	CVE-2023-35359	Windows Kernel	Elevation of Privilege	7.8	0.0989	More likely
Urgent	CVE-2023-35382	Windows Kernel	Elevation of Privilege	7.8	0.0558	More likely
Urgent	CVE-2023-35386	Windows Kernel	Elevation of Privilege	7.8	0.0555	More likely
Urgent	CVE-2023-35380	Windows Kernel	Elevation of Privilege	7.8	0.0358	More likely
Urgent	CVE-2023-36910	Windows Message Queuing	Remote Code Execution	9.8	0.0251	Exploitation Less Likely
Urgent	CVE-2023-35385	Windows Message Queuing	Remote Code Execution	9.8	0.0249	Exploitation Less Likely
Urgent	CVE-2023-36911	Windows Message Queuing	Remote Code Execution	9.8	0.0171	Exploitation Less Likely
Urgent	CVE-2023-35384	Windows HTML Platform	Security Feature Bypass	5.4	0.0157	More likely
High	CVE-2023-35383	Windows Message Queuing	Information Disclosure	7.5	0.0301	Exploitation Less Likely
High	CVE-2023-36912	Windows Message Queuing	Denial of Service	7.5	0.0207	Exploitation Less Likely
High	CVE-2023-38172	Windows Message Queuing	Denial of Service	7.5	0.0197	Exploitation Less Likely
High	CVE-2023-35381	Windows Fax and Scan Service	Remote Code Execution	8.8	0.0191	Exploitation Less Likely
High	CVE-2023-36903	Windows System Assessment Tool	Elevation of Privilege	7.8	0.0163	Exploitation Less Likely
High	CVE-2023-38184	Windows LDAP - Lightweight Directory Access Protocol	Remote Code Execution	7.5	0.0146	Exploitation Less Likely
High	CVE-2023-36882	Microsoft WDAC OLE DB provider for SQL	Remote Code Execution	8.8	0.0141	Exploitation Less Likely
High	CVE-2023-38186	Windows Mobile Device Management	Elevation of Privilege	8.8	0.0130	Exploitation Less Likely
High	CVE-2023-35387	Windows Bluetooth A2DP driver	Elevation of Privilege	8.8	0.0106	Exploitation Less Likely
High	CVE-2023-36898	Tablet Windows User Interface	Remote Code Execution	7.8	0.0072	Exploitation Less Likely
High	CVE-2023-36904	Windows Cloud Files Mini Filter Driver	Elevation of Privilege	7.8	0.0058	Exploitation Less Likely
High	CVE-2023-35378	Windows Projected File System	Elevation of Privilege	7.0	0.0035	Exploitation Less Likely
Routine	CVE-2023-20569	Microsoft Windows	Information Disclosure	5.6	0.0730	Exploitation Less Likely
Routine	CVE-2023-35376	Windows Message Queuing	Denial of Service	6.5	0.0221	Exploitation Less Likely
Routine	CVE-2023-35377	Windows Message Queuing	Denial of Service	6.5	0.0221	Exploitation Less Likely

Released the same day

KB5002422
Microsoft SharePoint Server 2019
KB5002435
Microsoft Office Online Server
KB5002436
Microsoft SharePoint Server 2019
KB5002437
Microsoft SharePoint Server Subscription Edition
KB5002449
Microsoft Outlook 2013 RT Service Pack 1, Microsoft Outlook 2013 Service Pack 1 (32-bit editions), Microsoft Outlook 2013 Service Pack 1 (64-bit editions)
KB5002451
Microsoft Excel 2013 RT Service Pack 1, Microsoft Excel 2013 Service Pack 1 (32-bit editions), Microsoft Excel 2013 Service Pack 1 (64-bit editions)
KB5002459
Microsoft Outlook 2016 (32-bit edition), Microsoft Outlook 2016 (64-bit edition)
KB5002463
Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition)
KB5025808
Microsoft SQL Server 2019 for x64-based Systems (CU 21)
KB5026806
Microsoft SQL Server 2022 for x64-based Systems (CU 5)
KB5028948
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 22H2 for ARM64-based Systems, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 22H2 for x64-based Systems
KB5028952
Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems, Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems, Microsoft .NET Framework 4.8 on Windows Server 2016 and 1 more

Vendor advisory

https://support.microsoft.com/help/5029253

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