# KB4457129: September 2018 security update KB4457129, released September 11, 2018, fixes 25 CVEs across 9 products. One of them is being exploited (CVE-2018-8440); 1 on CISA KEV. Patch Radar priority: Patch now. - Web page: https://patchblox.com/security/fix/microsoft/kb4457129 - Platform: Microsoft - Released: Sep 11, 2018 - Priority: Patch now (Closes CVE-2018-8440, exploited (CISA KEV, ransomware)) - CVEs: 25, exploited: 1, on CISA KEV: 1 - Vendor advisory: https://support.microsoft.com/help/4457129 ## Applies to | Product | Release | Fixed in | |---|---|---| | [Internet Explorer 11 on Windows 8.1 for 32-bit systems](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-8.1-for-32-bit-systems.md) | | | | [Internet Explorer 11 on Windows 8.1 for x64-based systems](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-8.1-for-x64-based-systems.md) | | | | [Internet Explorer 11 on Windows RT 8.1](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-rt-8.1.md) | | | | [Internet Explorer 11 on Windows Server 2012 R2](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-server-2012-r2.md) | | | | [Windows 8.1 for 32-bit systems](https://patchblox.com/security/data/product/microsoft/windows-8.1-for-32-bit-systems.md) | | | | [Windows 8.1 for x64-based systems](https://patchblox.com/security/data/product/microsoft/windows-8.1-for-x64-based-systems.md) | | | | [Windows RT 8.1](https://patchblox.com/security/data/product/microsoft/windows-rt-8.1.md) | | | | [Windows Server 2012 R2](https://patchblox.com/security/data/product/microsoft/windows-server-2012-r2.md) | | | | [Windows Server 2012 R2 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-2012-r2-server-core-installation.md) | | | ## CVEs this fix closes | CVE | Priority | Component | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2018-8440](https://patchblox.com/security/data/cve/CVE-2018-8440.md) | Patch now | Microsoft Windows | 7.8 | 0.1853 | CISA KEV, Ransomware, Disclosed | | [CVE-2018-8420](https://patchblox.com/security/data/cve/CVE-2018-8420.md) | Urgent | Microsoft XML Core Services | 7.5 | 0.4890 | More likely | | [CVE-2018-8332](https://patchblox.com/security/data/cve/CVE-2018-8332.md) | Urgent | Microsoft Graphics Component | 8.8 | 0.1907 | | | [CVE-2018-8475](https://patchblox.com/security/data/cve/CVE-2018-8475.md) | Urgent | Microsoft Graphics Component | 8.8 | 0.1586 | Disclosed | | [CVE-2018-8457](https://patchblox.com/security/data/cve/CVE-2018-8457.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.1308 | Disclosed | | [CVE-2018-8447](https://patchblox.com/security/data/cve/CVE-2018-8447.md) | Urgent | Internet Explorer | 6.4 | 0.1290 | More likely | | [CVE-2018-8468](https://patchblox.com/security/data/cve/CVE-2018-8468.md) | Urgent | Windows Shell | 4.3 | 0.1177 | More likely | | [CVE-2018-8452](https://patchblox.com/security/data/cve/CVE-2018-8452.md) | Urgent | Microsoft Scripting Engine | 4.3 | 0.0559 | More likely | | [CVE-2018-8439](https://patchblox.com/security/data/cve/CVE-2018-8439.md) | Urgent | Windows Hyper-V | 7.6 | 0.0431 | | | [CVE-2018-8410](https://patchblox.com/security/data/cve/CVE-2018-8410.md) | Urgent | Microsoft Windows | 7.0 | 0.0398 | More likely | | [CVE-2018-8470](https://patchblox.com/security/data/cve/CVE-2018-8470.md) | Urgent | Internet Explorer | 4.3 | 0.0327 | More likely | | [CVE-2018-8442](https://patchblox.com/security/data/cve/CVE-2018-8442.md) | Urgent | Windows Kernel | 4.7 | 0.0278 | More likely | | [CVE-2018-8392](https://patchblox.com/security/data/cve/CVE-2018-8392.md) | High | Microsoft JET Database Engine | 7.8 | 0.2276 | | | [CVE-2018-8393](https://patchblox.com/security/data/cve/CVE-2018-8393.md) | High | Microsoft JET Database Engine | 7.8 | 0.2248 | | | [CVE-2018-8444](https://patchblox.com/security/data/cve/CVE-2018-8444.md) | High | Windows SMB Server | 7.0 | 0.0586 | | | [CVE-2018-8424](https://patchblox.com/security/data/cve/CVE-2018-8424.md) | Routine | Microsoft Graphics Component | 4.7 | 0.1299 | | | [CVE-2018-8335](https://patchblox.com/security/data/cve/CVE-2018-8335.md) | Routine | Windows SMB Server | 4.8 | 0.0900 | | | [CVE-2018-8438](https://patchblox.com/security/data/cve/CVE-2018-8438.md) | Routine | Microsoft Windows | 5.8 | 0.0717 | | | [CVE-2018-8434](https://patchblox.com/security/data/cve/CVE-2018-8434.md) | Routine | Windows Hyper-V | 5.4 | 0.0349 | | | [CVE-2018-8315](https://patchblox.com/security/data/cve/CVE-2018-8315.md) | Routine | Microsoft Scripting Engine | 4.2 | 0.0318 | | | [CVE-2018-8443](https://patchblox.com/security/data/cve/CVE-2018-8443.md) | Routine | Windows Kernel | 4.7 | 0.0278 | | | [CVE-2018-8446](https://patchblox.com/security/data/cve/CVE-2018-8446.md) | Routine | Windows Kernel | 4.7 | 0.0278 | | | [CVE-2018-8271](https://patchblox.com/security/data/cve/CVE-2018-8271.md) | Routine | Microsoft Windows | 2.5 | 0.0278 | | | [CVE-2018-8433](https://patchblox.com/security/data/cve/CVE-2018-8433.md) | Routine | Microsoft Graphics Component | 4.7 | 0.0263 | | | [CVE-2018-8419](https://patchblox.com/security/data/cve/CVE-2018-8419.md) | Routine | Windows Media | 4.7 | 0.0168 | | --- 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 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.