# CVE-2020-1330: Windows Mobile Device Management Diagnostics Information Disclosure Vulnerability

CVE-2020-1330 is fixed in 17 products on 1 platform, first by KB4558998, released July 14, 2020. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-1330
- Priority: Routine
- CVSS: 5.5 (Important)
- EPSS: 0.0131
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Jul 14, 2020
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1330

## Description

<p>An information disclosure vulnerability exists when Windows Mobile Device Management (MDM) Diagnostics improperly handles junctions. An attacker who successfully exploited this vulnerability could bypass access restrictions to read files.</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 access files.</p> <p>The security update addresses the vulnerability by correcting the how Windows MDM Diagnostics handles files.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1809 for 32-bit Systems | 17763.1339 | [KB4558998](https://patchblox.com/security/data/fix/microsoft/kb4558998.md) | Jul 14, 2020 |
| Microsoft | Windows 10 Version 1809 for ARM64-based Systems | 17763.1339 | [KB4558998](https://patchblox.com/security/data/fix/microsoft/kb4558998.md) | Jul 14, 2020 |
| Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.1339 | [KB4558998](https://patchblox.com/security/data/fix/microsoft/kb4558998.md) | Jul 14, 2020 |
| Microsoft | Windows 10 Version 1903 for 32-bit Systems |  | [KB4565483](https://patchblox.com/security/data/fix/microsoft/kb4565483.md) | Jul 14, 2020 |
| Microsoft | Windows 10 Version 1903 for ARM64-based Systems |  | [KB4565483](https://patchblox.com/security/data/fix/microsoft/kb4565483.md) | Jul 14, 2020 |
| Microsoft | Windows 10 Version 1903 for x64-based Systems |  | [KB4565483](https://patchblox.com/security/data/fix/microsoft/kb4565483.md) | Jul 14, 2020 |
| Microsoft | Windows 10 Version 1909 for 32-bit Systems |  | [KB4565483](https://patchblox.com/security/data/fix/microsoft/kb4565483.md) | Jul 14, 2020 |
| Microsoft | Windows 10 Version 1909 for ARM64-based Systems |  | [KB4565483](https://patchblox.com/security/data/fix/microsoft/kb4565483.md) | Jul 14, 2020 |
| Microsoft | Windows 10 Version 1909 for x64-based Systems |  | [KB4565483](https://patchblox.com/security/data/fix/microsoft/kb4565483.md) | Jul 14, 2020 |
| Microsoft | Windows 10 Version 2004 for 32-bit Systems | 19041.388 | [KB4565503](https://patchblox.com/security/data/fix/microsoft/kb4565503.md) | Jul 14, 2020 |
| Microsoft | Windows 10 Version 2004 for ARM64-based Systems | 19041.388 | [KB4565503](https://patchblox.com/security/data/fix/microsoft/kb4565503.md) | Jul 14, 2020 |
| Microsoft | Windows 10 Version 2004 for x64-based Systems | 19041.388 | [KB4565503](https://patchblox.com/security/data/fix/microsoft/kb4565503.md) | Jul 14, 2020 |
| Microsoft | Windows Server 2019 | 17763.1339 | [KB4558998](https://patchblox.com/security/data/fix/microsoft/kb4558998.md) | Jul 14, 2020 |
| Microsoft | Windows Server 2019 (Server Core installation) | 17763.1339 | [KB4558998](https://patchblox.com/security/data/fix/microsoft/kb4558998.md) | Jul 14, 2020 |
| Microsoft | Windows Server, version 1903 (Server Core installation) |  | [KB4565483](https://patchblox.com/security/data/fix/microsoft/kb4565483.md) | Jul 14, 2020 |
| Microsoft | Windows Server, version 1909 (Server Core installation) |  | [KB4565483](https://patchblox.com/security/data/fix/microsoft/kb4565483.md) | Jul 14, 2020 |
| Microsoft | Windows Server, version 2004 (Server Core installation) | 19041.388 | [KB4565503](https://patchblox.com/security/data/fix/microsoft/kb4565503.md) | Jul 14, 2020 |

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Data as of 2026-11-08T00:53:09Z 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

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