# CVE-2018-8589: Windows Win32k Elevation of Privilege Vulnerability CVE-2018-8589 is fixed in 10 products on 1 platform, first by KB4467107, released November 13, 2018. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on May 23, 2022. Patch Radar priority: Patch now. - Web page: https://patchblox.com/security/cve/CVE-2018-8589 - Priority: Patch now - CVSS: 7.8 (Important) - EPSS: 0.0302 - CISA KEV: listed May 23, 2022, federal due date Jun 13, 2022 - Exploited (vendor report): yes - Publicly disclosed: no - Vendor exploitability assessment: Exploitation More Likely - Published: Nov 13, 2018 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-8589 ## Description

An elevation of privilege vulnerability exists when Windows improperly handles calls to Win32k.sys.

An attacker who successfully exploited this vulnerability could run arbitrary code in the security context of the local system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control over an affected system.

The update addresses the vulnerability by correcting how Windows handles calls to Win32k.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB4467107](https://patchblox.com/security/data/fix/microsoft/kb4467107.md) | Nov 13, 2018 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB4467106](https://patchblox.com/security/data/fix/microsoft/kb4467106.md) | Nov 13, 2018 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4467107](https://patchblox.com/security/data/fix/microsoft/kb4467107.md) | Nov 13, 2018 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4467106](https://patchblox.com/security/data/fix/microsoft/kb4467106.md) | Nov 13, 2018 | | Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | | [KB4467107](https://patchblox.com/security/data/fix/microsoft/kb4467107.md) | Nov 13, 2018 | | Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | | [KB4467106](https://patchblox.com/security/data/fix/microsoft/kb4467106.md) | Nov 13, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4467107](https://patchblox.com/security/data/fix/microsoft/kb4467107.md) | Nov 13, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4467106](https://patchblox.com/security/data/fix/microsoft/kb4467106.md) | Nov 13, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4467107](https://patchblox.com/security/data/fix/microsoft/kb4467107.md) | Nov 13, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4467106](https://patchblox.com/security/data/fix/microsoft/kb4467106.md) | Nov 13, 2018 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB4467706](https://patchblox.com/security/data/fix/microsoft/kb4467706.md) | Nov 13, 2018 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB4467700](https://patchblox.com/security/data/fix/microsoft/kb4467700.md) | Nov 13, 2018 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | | [KB4467706](https://patchblox.com/security/data/fix/microsoft/kb4467706.md) | Nov 13, 2018 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | | [KB4467700](https://patchblox.com/security/data/fix/microsoft/kb4467700.md) | Nov 13, 2018 | | Microsoft | Windows Server 2008 for Itanium-Based Systems Service Pack 2 | | [KB4467706](https://patchblox.com/security/data/fix/microsoft/kb4467706.md) | Nov 13, 2018 | | Microsoft | Windows Server 2008 for Itanium-Based Systems Service Pack 2 | | [KB4467700](https://patchblox.com/security/data/fix/microsoft/kb4467700.md) | Nov 13, 2018 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4467706](https://patchblox.com/security/data/fix/microsoft/kb4467706.md) | Nov 13, 2018 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4467700](https://patchblox.com/security/data/fix/microsoft/kb4467700.md) | Nov 13, 2018 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | | [KB4467706](https://patchblox.com/security/data/fix/microsoft/kb4467706.md) | Nov 13, 2018 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | | [KB4467700](https://patchblox.com/security/data/fix/microsoft/kb4467700.md) | Nov 13, 2018 | --- 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.