# CVE-2017-11829: Windows Update Delivery Optimization Elevation of Privilege Vulnerability

CVE-2017-11829 is fixed in 6 products on 1 platform, first by KB4041691, released October 10, 2017. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2017-11829
- Priority: Routine
- CVSS: 5.5 (Important)
- EPSS: 0.0378
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Oct 10, 2017
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2017-11829

## Description

<p>An elevation of privilege vulnerability exists when the Windows Update Delivery Optimization does not properly enforce file share permissions. An attacker who successfully exploited the vulnerability could overwrite files that require higher privileges than what the attacker already has.</p> <p>To exploit this vulnerability, an attacker would need to log into a system. The attacker could then create a Delivery Optimization job to exploit the vulnerability.</p> <p>The security update addresses the vulnerability by correcting how the Delivery Optimization services enforces permissions.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1607 for 32-bit Systems | 14393.1770 | [KB4041691](https://patchblox.com/security/data/fix/microsoft/kb4041691.md) | Oct 10, 2017 |
| Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.1770 | [KB4041691](https://patchblox.com/security/data/fix/microsoft/kb4041691.md) | Oct 10, 2017 |
| Microsoft | Windows 10 Version 1703 for 32-bit Systems | 15063.674 | [KB4041676](https://patchblox.com/security/data/fix/microsoft/kb4041676.md) | Oct 10, 2017 |
| Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.674 | [KB4041676](https://patchblox.com/security/data/fix/microsoft/kb4041676.md) | Oct 10, 2017 |
| Microsoft | Windows Server 2016 | 14393.1770 | [KB4041691](https://patchblox.com/security/data/fix/microsoft/kb4041691.md) | Oct 10, 2017 |
| Microsoft | Windows Server 2016 (Server Core installation) | 14393.1770 | [KB4041691](https://patchblox.com/security/data/fix/microsoft/kb4041691.md) | Oct 10, 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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