# CVE-2017-8625: Internet Explorer Security Feature Bypass Vulnerability

CVE-2017-8625 is fixed in 7 products on 1 platform, first by KB4034660, released August 8, 2017. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2017-8625
- Priority: Routine
- CVSS: 5.3 (Low)
- EPSS: 0.1538
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Aug 8, 2017
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2017-8625

## Description

<p>A security feature bypass vulnerability exists when Internet Explorer fails to validate User Mode Code Integrity (UMCI) policies. The vulnerability could allow an attacker to bypass Device Guard UMCI policies.</p> <p>To exploit the vulnerability, a user could either visit a malicious website or an attacker with access to the system could run a specially crafted application. An attacker could then leverage the vulnerability to run unsigned malicious code as though it were signed by a trusted source.</p> <p>The update addresses the vulnerability by correcting how Internet Explorer validates UMCI policies.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Internet Explorer 11 on Windows 10 Version 1511 for 32-bit Systems | 10586.1045 | [KB4034660](https://patchblox.com/security/data/fix/microsoft/kb4034660.md) | Aug 8, 2017 |
| Microsoft | Internet Explorer 11 on Windows 10 Version 1511 for x64-based Systems | 10586.1045 | [KB4034660](https://patchblox.com/security/data/fix/microsoft/kb4034660.md) | Aug 8, 2017 |
| Microsoft | Internet Explorer 11 on Windows 10 Version 1607 for 32-bit Systems | 14393.1593 | [KB4034658](https://patchblox.com/security/data/fix/microsoft/kb4034658.md) | Aug 8, 2017 |
| Microsoft | Internet Explorer 11 on Windows 10 Version 1607 for x64-based Systems | 14393.1593 | [KB4034658](https://patchblox.com/security/data/fix/microsoft/kb4034658.md) | Aug 8, 2017 |
| Microsoft | Internet Explorer 11 on Windows 10 for 32-bit Systems | 10240.17533 | [KB4034668](https://patchblox.com/security/data/fix/microsoft/kb4034668.md) | Aug 8, 2017 |
| Microsoft | Internet Explorer 11 on Windows 10 for x64-based Systems | 10240.17533 | [KB4034668](https://patchblox.com/security/data/fix/microsoft/kb4034668.md) | Aug 8, 2017 |
| Microsoft | Internet Explorer 11 on Windows Server 2016 | 14393.1593 | [KB4034658](https://patchblox.com/security/data/fix/microsoft/kb4034658.md) | Aug 8, 2017 |

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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