# CVE-2018-0877: Windows Desktop Bridge VFS Elevation of Privilege Vulnerability

CVE-2018-0877 is fixed in 8 products on 1 platform, first by KB4088787, released March 13, 2018. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2018-0877
- Priority: High
- CVSS: 7.0 (Important)
- EPSS: 0.0335
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Mar 13, 2018
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-0877

## Description

<p>An elevation of privilege vulnerability exists in Windows when the Desktop Bridge VFS does not take into acccount user/kernel mode when managing file paths. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.</p> <p>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 of an affected system.</p> <p>The update addresses this vulnerability by correcting how the Windows Desktop Bridge VFS handles file path management.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1607 for 32-bit Systems |  | [KB4088787](https://patchblox.com/security/data/fix/microsoft/kb4088787.md) | Mar 13, 2018 |
| Microsoft | Windows 10 Version 1607 for x64-based Systems |  | [KB4088787](https://patchblox.com/security/data/fix/microsoft/kb4088787.md) | Mar 13, 2018 |
| Microsoft | Windows 10 Version 1703 for 32-bit Systems |  | [KB4088782](https://patchblox.com/security/data/fix/microsoft/kb4088782.md) | Mar 13, 2018 |
| Microsoft | Windows 10 Version 1703 for x64-based Systems |  | [KB4088782](https://patchblox.com/security/data/fix/microsoft/kb4088782.md) | Mar 13, 2018 |
| Microsoft | Windows 10 Version 1709 for 32-bit Systems | 16299.309 | [KB4088776](https://patchblox.com/security/data/fix/microsoft/kb4088776.md) | Mar 13, 2018 |
| Microsoft | Windows Server 2016 |  | [KB4088787](https://patchblox.com/security/data/fix/microsoft/kb4088787.md) | Mar 13, 2018 |
| Microsoft | Windows Server 2016 (Server Core installation) |  | [KB4088787](https://patchblox.com/security/data/fix/microsoft/kb4088787.md) | Mar 13, 2018 |
| Microsoft | Windows Server, version 1709  (Server Core Installation) | 16299.309 | [KB4088776](https://patchblox.com/security/data/fix/microsoft/kb4088776.md) | Mar 13, 2018 |

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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