# KB5031358: October 2023 cumulative update for Windows 11 21H2 KB5031358, released October 10, 2023, fixes 75 CVEs across 2 products. 3 of them are being exploited (CVE-2023-44487); 3 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported. - Web page: https://patchblox.com/security/fix/microsoft/kb5031358 - Platform: Microsoft - Released: Oct 10, 2023 - Priority: Patch now (Closes CVE-2023-44487, exploited (CISA KEV)) - CVEs: 75, exploited: 3, on CISA KEV: 3 - Vendor advisory: https://support.microsoft.com/help/5031358 ## Applies to | Product | Release | Fixed in | |---|---|---| | [Windows 11 version 21H2 for ARM64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-11-version-21h2-for-arm64-based-systems.md) | | 22000.2538 | | [Windows 11 version 21H2 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-11-version-21h2-for-x64-based-systems.md) | | 22000.2538 | ## CVEs this fix closes | CVE | Priority | Component | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2023-44487](https://patchblox.com/security/data/cve/CVE-2023-44487.md) | Patch now | HTTP/2 | 7.5 | 1.0000 | CISA KEV | | [CVE-2023-36563](https://patchblox.com/security/data/cve/CVE-2023-36563.md) | Patch now | Microsoft WordPad | 6.5 | 0.2032 | CISA KEV, Disclosed | | [CVE-2023-36584](https://patchblox.com/security/data/cve/CVE-2023-36584.md) | Patch now | Windows Mark of the Web (MOTW) | 5.4 | 0.0325 | CISA KEV | | [CVE-2023-38171](https://patchblox.com/security/data/cve/CVE-2023-38171.md) | Urgent | Microsoft QUIC | 7.5 | 0.7105 | More likely | | [CVE-2023-41772](https://patchblox.com/security/data/cve/CVE-2023-41772.md) | Urgent | Windows Win32K | 7.8 | 0.1331 | More likely | | [CVE-2023-36594](https://patchblox.com/security/data/cve/CVE-2023-36594.md) | Urgent | Microsoft Graphics Component | 7.8 | 0.0800 | More likely | | [CVE-2023-36713](https://patchblox.com/security/data/cve/CVE-2023-36713.md) | Urgent | Windows Common Log File System Driver | 5.5 | 0.0733 | More likely | | [CVE-2023-36731](https://patchblox.com/security/data/cve/CVE-2023-36731.md) | Urgent | Windows Win32K | 7.8 | 0.0662 | More likely | | [CVE-2023-38159](https://patchblox.com/security/data/cve/CVE-2023-38159.md) | Urgent | Microsoft Graphics Component | 7.0 | 0.0406 | More likely | | [CVE-2023-36743](https://patchblox.com/security/data/cve/CVE-2023-36743.md) | Urgent | Windows Win32K | 7.8 | 0.0363 | More likely | | [CVE-2023-35349](https://patchblox.com/security/data/cve/CVE-2023-35349.md) | Urgent | Windows Message Queuing | 9.8 | 0.0289 | | | [CVE-2023-36697](https://patchblox.com/security/data/cve/CVE-2023-36697.md) | Urgent | Windows Message Queuing | 6.8 | 0.0220 | | | [CVE-2023-36776](https://patchblox.com/security/data/cve/CVE-2023-36776.md) | Urgent | Windows Win32K | 7.0 | 0.0205 | More likely | | [CVE-2023-36718](https://patchblox.com/security/data/cve/CVE-2023-36718.md) | Urgent | Windows Virtual Trusted Platform Module | 7.8 | 0.0133 | | | [CVE-2023-41773](https://patchblox.com/security/data/cve/CVE-2023-41773.md) | Urgent | Windows Layer 2 Tunneling Protocol | 8.1 | 0.0131 | | | [CVE-2023-41774](https://patchblox.com/security/data/cve/CVE-2023-41774.md) | Urgent | Windows Layer 2 Tunneling Protocol | 8.1 | 0.0131 | | | [CVE-2023-38166](https://patchblox.com/security/data/cve/CVE-2023-38166.md) | Urgent | Windows Layer 2 Tunneling Protocol | 8.1 | 0.0130 | | | [CVE-2023-41765](https://patchblox.com/security/data/cve/CVE-2023-41765.md) | Urgent | Windows Layer 2 Tunneling Protocol | 8.1 | 0.0130 | | | [CVE-2023-41767](https://patchblox.com/security/data/cve/CVE-2023-41767.md) | Urgent | Windows Layer 2 Tunneling Protocol | 8.1 | 0.0130 | | | [CVE-2023-41768](https://patchblox.com/security/data/cve/CVE-2023-41768.md) | Urgent | Windows Layer 2 Tunneling Protocol | 8.1 | 0.0130 | | | [CVE-2023-41769](https://patchblox.com/security/data/cve/CVE-2023-41769.md) | Urgent | Windows Layer 2 Tunneling Protocol | 8.1 | 0.0130 | | | [CVE-2023-41770](https://patchblox.com/security/data/cve/CVE-2023-41770.md) | Urgent | Windows Layer 2 Tunneling Protocol | 8.1 | 0.0130 | | | [CVE-2023-41771](https://patchblox.com/security/data/cve/CVE-2023-41771.md) | Urgent | Windows Layer 2 Tunneling Protocol | 8.1 | 0.0130 | | | [CVE-2023-36732](https://patchblox.com/security/data/cve/CVE-2023-36732.md) | Urgent | Windows Win32K | 7.8 | 0.0063 | More likely | | [CVE-2023-36606](https://patchblox.com/security/data/cve/CVE-2023-36606.md) | High | Windows Message Queuing | 7.5 | 0.6936 | | | [CVE-2023-36435](https://patchblox.com/security/data/cve/CVE-2023-36435.md) | High | Microsoft QUIC | 7.5 | 0.0572 | | | [CVE-2023-36709](https://patchblox.com/security/data/cve/CVE-2023-36709.md) | High | Windows AllJoyn API | 7.5 | 0.0268 | | | [CVE-2023-36585](https://patchblox.com/security/data/cve/CVE-2023-36585.md) | High | Windows UPnP Device Host | 7.5 | 0.0260 | | | [CVE-2023-36720](https://patchblox.com/security/data/cve/CVE-2023-36720.md) | High | Windows Mixed Reality Developer Tools | 7.5 | 0.0252 | | | [CVE-2023-36431](https://patchblox.com/security/data/cve/CVE-2023-36431.md) | High | Windows Message Queuing | 7.5 | 0.0248 | | | [CVE-2023-36579](https://patchblox.com/security/data/cve/CVE-2023-36579.md) | High | Windows Message Queuing | 7.5 | 0.0248 | | | [CVE-2023-36581](https://patchblox.com/security/data/cve/CVE-2023-36581.md) | High | Windows Message Queuing | 7.5 | 0.0248 | | | [CVE-2023-36602](https://patchblox.com/security/data/cve/CVE-2023-36602.md) | High | Windows TCP/IP | 7.5 | 0.0248 | | | [CVE-2023-36603](https://patchblox.com/security/data/cve/CVE-2023-36603.md) | High | Windows TCP/IP | 7.5 | 0.0248 | | | [CVE-2023-36434](https://patchblox.com/security/data/cve/CVE-2023-36434.md) | High | Windows IIS | 9.8 | 0.0227 | | | [CVE-2023-36596](https://patchblox.com/security/data/cve/CVE-2023-36596.md) | High | Windows Remote Procedure Call | 7.5 | 0.0211 | | | [CVE-2023-36567](https://patchblox.com/security/data/cve/CVE-2023-36567.md) | High | Windows Deployment Services | 7.5 | 0.0208 | | | [CVE-2023-36438](https://patchblox.com/security/data/cve/CVE-2023-36438.md) | High | Windows TCP/IP | 7.5 | 0.0203 | | | [CVE-2023-36723](https://patchblox.com/security/data/cve/CVE-2023-36723.md) | High | Windows Container Manager Service | 7.8 | 0.0196 | | | [CVE-2023-36577](https://patchblox.com/security/data/cve/CVE-2023-36577.md) | High | Microsoft WDAC OLE DB provider for SQL | 8.8 | 0.0177 | | | [CVE-2023-36710](https://patchblox.com/security/data/cve/CVE-2023-36710.md) | High | Microsoft Windows Media Foundation | 7.8 | 0.0093 | | | [CVE-2023-36436](https://patchblox.com/security/data/cve/CVE-2023-36436.md) | High | Windows HTML Platform | 7.8 | 0.0085 | | | [CVE-2023-36593](https://patchblox.com/security/data/cve/CVE-2023-36593.md) | High | Windows Message Queuing | 7.8 | 0.0082 | | | [CVE-2023-36578](https://patchblox.com/security/data/cve/CVE-2023-36578.md) | High | Windows Message Queuing | 7.3 | 0.0082 | | | [CVE-2023-36582](https://patchblox.com/security/data/cve/CVE-2023-36582.md) | High | Windows Message Queuing | 7.3 | 0.0082 | | | [CVE-2023-36583](https://patchblox.com/security/data/cve/CVE-2023-36583.md) | High | Windows Message Queuing | 7.3 | 0.0082 | | | [CVE-2023-36590](https://patchblox.com/security/data/cve/CVE-2023-36590.md) | High | Windows Message Queuing | 7.3 | 0.0082 | | | [CVE-2023-41766](https://patchblox.com/security/data/cve/CVE-2023-41766.md) | High | Client Server Run-time Subsystem (CSRSS) | 7.8 | 0.0082 | | | [CVE-2023-36598](https://patchblox.com/security/data/cve/CVE-2023-36598.md) | High | Microsoft WDAC ODBC Driver | 7.8 | 0.0081 | | | [CVE-2023-36712](https://patchblox.com/security/data/cve/CVE-2023-36712.md) | High | Windows Kernel | 7.8 | 0.0081 | | | [CVE-2023-36570](https://patchblox.com/security/data/cve/CVE-2023-36570.md) | High | Windows Message Queuing | 7.3 | 0.0081 | | | [CVE-2023-36571](https://patchblox.com/security/data/cve/CVE-2023-36571.md) | High | Windows Message Queuing | 7.3 | 0.0081 | | | [CVE-2023-36572](https://patchblox.com/security/data/cve/CVE-2023-36572.md) | High | Windows Message Queuing | 7.3 | 0.0081 | | | [CVE-2023-36573](https://patchblox.com/security/data/cve/CVE-2023-36573.md) | High | Windows Message Queuing | 7.3 | 0.0081 | | | [CVE-2023-36574](https://patchblox.com/security/data/cve/CVE-2023-36574.md) | High | Windows Message Queuing | 7.3 | 0.0081 | | | [CVE-2023-36575](https://patchblox.com/security/data/cve/CVE-2023-36575.md) | High | Windows Message Queuing | 7.3 | 0.0081 | | | [CVE-2023-36589](https://patchblox.com/security/data/cve/CVE-2023-36589.md) | High | Windows Message Queuing | 7.3 | 0.0081 | | | [CVE-2023-36591](https://patchblox.com/security/data/cve/CVE-2023-36591.md) | High | Windows Message Queuing | 7.3 | 0.0081 | | | [CVE-2023-36592](https://patchblox.com/security/data/cve/CVE-2023-36592.md) | High | Windows Message Queuing | 7.3 | 0.0081 | | | [CVE-2023-36702](https://patchblox.com/security/data/cve/CVE-2023-36702.md) | High | Windows Microsoft DirectMusic | 7.8 | 0.0081 | | | [CVE-2023-36557](https://patchblox.com/security/data/cve/CVE-2023-36557.md) | High | Windows HTML Platform | 7.8 | 0.0080 | | | [CVE-2023-36711](https://patchblox.com/security/data/cve/CVE-2023-36711.md) | High | Windows Runtime C++ Template Library | 7.8 | 0.0063 | | | [CVE-2023-36701](https://patchblox.com/security/data/cve/CVE-2023-36701.md) | High | Windows Resilient File System (ReFS) | 7.8 | 0.0058 | | | [CVE-2023-36726](https://patchblox.com/security/data/cve/CVE-2023-36726.md) | High | Windows IKE Extension | 7.8 | 0.0058 | | | [CVE-2023-36729](https://patchblox.com/security/data/cve/CVE-2023-36729.md) | High | Windows Named Pipe File System | 7.8 | 0.0058 | | | [CVE-2023-36725](https://patchblox.com/security/data/cve/CVE-2023-36725.md) | High | Windows NT OS Kernel | 7.8 | 0.0050 | | | [CVE-2023-36902](https://patchblox.com/security/data/cve/CVE-2023-36902.md) | High | Windows Client/Server Runtime Subsystem | 7.0 | 0.0050 | | | [CVE-2023-36605](https://patchblox.com/security/data/cve/CVE-2023-36605.md) | High | Windows Named Pipe File System | 7.4 | 0.0048 | | | [CVE-2023-36721](https://patchblox.com/security/data/cve/CVE-2023-36721.md) | High | Windows Error Reporting | 7.0 | 0.0041 | | | [CVE-2023-36564](https://patchblox.com/security/data/cve/CVE-2023-36564.md) | Routine | Microsoft Windows Search Component | 6.5 | 0.0143 | | | [CVE-2023-36722](https://patchblox.com/security/data/cve/CVE-2023-36722.md) | Routine | Active Directory Domain Services | 4.4 | 0.0137 | | | [CVE-2023-36576](https://patchblox.com/security/data/cve/CVE-2023-36576.md) | Routine | Windows Kernel | 5.5 | 0.0087 | | | [CVE-2023-36717](https://patchblox.com/security/data/cve/CVE-2023-36717.md) | Routine | Windows TPM | 6.5 | 0.0070 | | | [CVE-2023-36724](https://patchblox.com/security/data/cve/CVE-2023-36724.md) | Routine | Windows Power Management Service | 5.5 | 0.0054 | | | [CVE-2023-36698](https://patchblox.com/security/data/cve/CVE-2023-36698.md) | Routine | Windows Kernel | 4.4 | 0.0047 | | --- Data as of 2026-11-07T18:46:35Z 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 Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.