# CVE-2018-8495: Windows Shell Remote Code Execution Vulnerability

CVE-2018-8495 is fixed in 12 products on 1 platform, first by KB4462917, released October 9, 2018. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-8495
- Priority: Routine
- CVSS: 4.2 (Important)
- EPSS: 0.5101
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: N/A
- Published: Oct 9, 2018
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-8495

## Description

<p>A remote code execution vulnerability exists when Windows Shell improperly handles URIs. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.</p> <p>An attacker could host a specially crafted website that is designed to exploit the vulnerability through Microsoft Edge, and then convince a user to view the website. The attack requires specific user interaction which an attacker would need to trick the user into performing. There is no way an attacker could exploit the vulnerability without the user performing the specific action.</p> <p>The security update addresses the vulnerability by modifying how Windows Shell handles URIs.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1607 for 32-bit Systems | 14393.2551 | [KB4462917](https://patchblox.com/security/data/fix/microsoft/kb4462917.md) | Oct 9, 2018 |
| Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.2551 | [KB4462917](https://patchblox.com/security/data/fix/microsoft/kb4462917.md) | Oct 9, 2018 |
| Microsoft | Windows 10 Version 1703 for 32-bit Systems | 15063.1387 | [KB4462937](https://patchblox.com/security/data/fix/microsoft/kb4462937.md) | Oct 9, 2018 |
| Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.1387 | [KB4462937](https://patchblox.com/security/data/fix/microsoft/kb4462937.md) | Oct 9, 2018 |
| Microsoft | Windows 10 Version 1709 for 32-bit Systems | 16299.726 | [KB4462918](https://patchblox.com/security/data/fix/microsoft/kb4462918.md) | Oct 9, 2018 |
| Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.726 | [KB4462918](https://patchblox.com/security/data/fix/microsoft/kb4462918.md) | Oct 9, 2018 |
| Microsoft | Windows 10 Version 1803 for 32-bit Systems | 17134.345 | [KB4462919](https://patchblox.com/security/data/fix/microsoft/kb4462919.md) | Oct 9, 2018 |
| Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.345 | [KB4462919](https://patchblox.com/security/data/fix/microsoft/kb4462919.md) | Oct 9, 2018 |
| Microsoft | Windows Server 2016 | 14393.2551 | [KB4462917](https://patchblox.com/security/data/fix/microsoft/kb4462917.md) | Oct 9, 2018 |
| Microsoft | Windows Server 2016 (Server Core installation) | 14393.2551 | [KB4462917](https://patchblox.com/security/data/fix/microsoft/kb4462917.md) | Oct 9, 2018 |
| Microsoft | Windows Server, version 1709  (Server Core Installation) | 16299.726 | [KB4462918](https://patchblox.com/security/data/fix/microsoft/kb4462918.md) | Oct 9, 2018 |
| Microsoft | Windows Server, version 1803  (Server Core Installation) | 17134.345 | [KB4462919](https://patchblox.com/security/data/fix/microsoft/kb4462919.md) | Oct 9, 2018 |

---

Data as of 2026-11-07T12:40:37Z 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