# CVE-2018-0871: Microsoft Edge Information Disclosure Vulnerability

CVE-2018-0871 is fixed in 6 products on 1 platform, first by KB4284874, released June 12, 2018. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-0871
- Priority: Routine
- CVSS: 4.3 (Important)
- EPSS: 0.0681
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Jun 12, 2018
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-0871

## Description

<p>An information disclosure vulnerability exists when Edge improperly marks files.</p> <p>An attacker who successfully exploited this vulnerability could exfiltrate file contents from disk. For an attack to be successful, an attacker must persuade a user to open a malicious website.</p> <p>The security update addresses the vulnerability by properly marking files.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for 32-bit Systems | 15063.1155 | [KB4284874](https://patchblox.com/security/data/fix/microsoft/kb4284874.md) | Jun 12, 2018 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for x64-based Systems | 15063.1155 | [KB4284874](https://patchblox.com/security/data/fix/microsoft/kb4284874.md) | Jun 12, 2018 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for 32-bit Systems | 16299.492 | [KB4284819](https://patchblox.com/security/data/fix/microsoft/kb4284819.md) | Jun 12, 2018 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for x64-based Systems | 16299.492 | [KB4284819](https://patchblox.com/security/data/fix/microsoft/kb4284819.md) | Jun 12, 2018 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for 32-bit Systems | 17134.112 | [KB4284835](https://patchblox.com/security/data/fix/microsoft/kb4284835.md) | Jun 12, 2018 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for x64-based Systems | 17134.112 | [KB4284835](https://patchblox.com/security/data/fix/microsoft/kb4284835.md) | Jun 12, 2018 |

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Data as of 2026-11-08T06:59:42Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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