# CVE-2020-0786: Windows Tile Object Service Denial of Service Vulnerability

CVE-2020-0786 is fixed in 6 products on 1 platform, first by KB4540670, released March 10, 2020. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2020-0786
- Priority: High
- CVSS: 7.1 (Important)
- EPSS: 0.0082
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Mar 10, 2020
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-0786

## Description

<p>A denial of service vulnerability exists when the Windows Tile Object Service improperly handles hard links. An attacker who successfully exploited the vulnerability could cause a target system to stop responding.</p> <p>To exploit this vulnerability, an attacker would have to log on to an affected system and run a specially crafted application. The vulnerability would allow an attacker to overwrite system files.</p> <p>The update addresses the vulnerability by correcting how the Windows Tile Object Service handles hard links.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1607 for 32-bit Systems | 14393.3564 | [KB4540670](https://patchblox.com/security/data/fix/microsoft/kb4540670.md) | Mar 10, 2020 |
| Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.3564 | [KB4540670](https://patchblox.com/security/data/fix/microsoft/kb4540670.md) | Mar 10, 2020 |
| Microsoft | Windows 10 for 32-bit Systems | 10240.18519 | [KB4540693](https://patchblox.com/security/data/fix/microsoft/kb4540693.md) | Mar 10, 2020 |
| Microsoft | Windows 10 for x64-based Systems | 10240.18519 | [KB4540693](https://patchblox.com/security/data/fix/microsoft/kb4540693.md) | Mar 10, 2020 |
| Microsoft | Windows Server 2016 | 14393.3564 | [KB4540670](https://patchblox.com/security/data/fix/microsoft/kb4540670.md) | Mar 10, 2020 |
| Microsoft | Windows Server 2016 (Server Core installation) | 14393.3564 | [KB4540670](https://patchblox.com/security/data/fix/microsoft/kb4540670.md) | Mar 10, 2020 |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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