# CVE-2018-0878: Windows Remote Assistance Information Disclosure Vulnerability CVE-2018-0878 is fixed in 28 products on 1 platform, first by KB4088779, released March 13, 2018. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2018-0878 - Priority: Routine - CVSS: 3.1 (Important) - EPSS: 0.2112 - 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-2018-0878 ## Description

An information disclosure vulnerability exists when Windows Remote Assistance incorrectly processes XML External Entities (XXE). An attacker who successfully exploited the vulnerability could obtain information to further compromise the user’s system.

To exploit this condition, an attacker would need to send a specially crafted Remote Assistance invitation file to a user. A attacker could then steal text files from known locations on the victim's machine, under the context of the user, or alternatively, steal text information from URLs accessible to the victim. The stolen information could be submitted as part of the URL in HTTP request(s) to the attacker. In all cases an attacker would have no way to force a user to view the attacker-controlled content. Instead, an attacker would have to convince a user to take action.

Note that the information disclosure vulnerability by itself would not be sufficient for an attacker to compromise a system. However, an attacker could combine this vulnerability with additional vulnerabilities to further exploit the system.

The update addresses the vulnerability by correcting how Windows Remote Assistance processes XML External Entities (XXE).

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1511 for 32-bit Systems | 10586.1478 | [KB4088779](https://patchblox.com/security/data/fix/microsoft/kb4088779.md) | Mar 13, 2018 | | Microsoft | Windows 10 Version 1511 for x64-based Systems | 10586.1478 | [KB4088779](https://patchblox.com/security/data/fix/microsoft/kb4088779.md) | Mar 13, 2018 | | 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 10 Version 1709 for x64-based Systems | 16299.309 | [KB4088776](https://patchblox.com/security/data/fix/microsoft/kb4088776.md) | Mar 13, 2018 | | Microsoft | Windows 10 for 32-bit Systems | 10240.17797 | [KB4088786](https://patchblox.com/security/data/fix/microsoft/kb4088786.md) | Mar 13, 2018 | | Microsoft | Windows 10 for x64-based Systems | 10240.17797 | [KB4088786](https://patchblox.com/security/data/fix/microsoft/kb4088786.md) | Mar 13, 2018 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB4088878](https://patchblox.com/security/data/fix/microsoft/kb4088878.md) | Mar 13, 2018 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB4088875](https://patchblox.com/security/data/fix/microsoft/kb4088875.md) | Mar 13, 2018 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4088878](https://patchblox.com/security/data/fix/microsoft/kb4088878.md) | Mar 13, 2018 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4088875](https://patchblox.com/security/data/fix/microsoft/kb4088875.md) | Mar 13, 2018 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB4088876](https://patchblox.com/security/data/fix/microsoft/kb4088876.md) | Mar 13, 2018 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB4088879](https://patchblox.com/security/data/fix/microsoft/kb4088879.md) | Mar 13, 2018 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4088876](https://patchblox.com/security/data/fix/microsoft/kb4088876.md) | Mar 13, 2018 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4088879](https://patchblox.com/security/data/fix/microsoft/kb4088879.md) | Mar 13, 2018 | | Microsoft | Windows RT 8.1 | | [KB4088876](https://patchblox.com/security/data/fix/microsoft/kb4088876.md) | Mar 13, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4088878](https://patchblox.com/security/data/fix/microsoft/kb4088878.md) | Mar 13, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4088875](https://patchblox.com/security/data/fix/microsoft/kb4088875.md) | Mar 13, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4088878](https://patchblox.com/security/data/fix/microsoft/kb4088878.md) | Mar 13, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4088875](https://patchblox.com/security/data/fix/microsoft/kb4088875.md) | Mar 13, 2018 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB4089453](https://patchblox.com/security/data/fix/microsoft/kb4089453.md) | Mar 13, 2018 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | | [KB4089453](https://patchblox.com/security/data/fix/microsoft/kb4089453.md) | Mar 13, 2018 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4089453](https://patchblox.com/security/data/fix/microsoft/kb4089453.md) | Mar 13, 2018 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | | [KB4089453](https://patchblox.com/security/data/fix/microsoft/kb4089453.md) | Mar 13, 2018 | | Microsoft | Windows Server 2012 | | [KB4088877](https://patchblox.com/security/data/fix/microsoft/kb4088877.md) | Mar 13, 2018 | | Microsoft | Windows Server 2012 | | [KB4088880](https://patchblox.com/security/data/fix/microsoft/kb4088880.md) | Mar 13, 2018 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4088877](https://patchblox.com/security/data/fix/microsoft/kb4088877.md) | Mar 13, 2018 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4088880](https://patchblox.com/security/data/fix/microsoft/kb4088880.md) | Mar 13, 2018 | | Microsoft | Windows Server 2012 R2 | | [KB4088876](https://patchblox.com/security/data/fix/microsoft/kb4088876.md) | Mar 13, 2018 | | Microsoft | Windows Server 2012 R2 | | [KB4088879](https://patchblox.com/security/data/fix/microsoft/kb4088879.md) | Mar 13, 2018 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4088876](https://patchblox.com/security/data/fix/microsoft/kb4088876.md) | Mar 13, 2018 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4088879](https://patchblox.com/security/data/fix/microsoft/kb4088879.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 | --- 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