# CVE-2017-11874: Microsoft Edge Security Feature Bypass Vulnerability

CVE-2017-11874 is fixed in 4 products on 1 platform, first by KB4048954, released November 14, 2017. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2017-11874
- Priority: Routine
- CVSS: 3.1 (Important)
- EPSS: 0.0397
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Nov 14, 2017
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2017-11874

## Description

<p>A security feature bypass vulnerability exists in Microsoft Edge as a result of how memory is accessed in code compiled by the Edge Just-In-Time (JIT) compiler that allows Control Flow Guard (CFG) to be bypassed. By itself, this CFG bypass vulnerability does not allow arbitrary code execution. However, an attacker could use the CFG bypass vulnerability in conjunction with another vulnerability, such as a remote code execution vulnerability, to run arbitrary code on a target system.</p> <p>To exploit the CFG bypass vulnerability, a user must be logged on and running an affected version of Microsoft Edge. The user would then need to browse to a malicious website.</p> <p>The security update addresses the CFG bypass vulnerability by helping to ensure that Microsoft Edge properly handles accessing memory in code compiled by the Edge JIT compiler.</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 |  | [KB4048954](https://patchblox.com/security/data/fix/microsoft/kb4048954.md) | Nov 14, 2017 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for x64-based Systems |  | [KB4048954](https://patchblox.com/security/data/fix/microsoft/kb4048954.md) | Nov 14, 2017 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for 32-bit Systems | 16299.64 | [KB4048955](https://patchblox.com/security/data/fix/microsoft/kb4048955.md) | Nov 14, 2017 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for x64-based Systems | 16299.64 | [KB4048955](https://patchblox.com/security/data/fix/microsoft/kb4048955.md) | Nov 14, 2017 |

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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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