# CVE-2018-0902: CNG Security Feature Bypass Vulnerability

CVE-2018-0902 is fixed in 13 products on 1 platform, first by KB4088779, released March 13, 2018. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-0902
- Priority: Routine
- CVSS: 5.3 (Important)
- EPSS: 0.0111
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Mar 13, 2018
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-0902

## Description

<p>A security feature bypass vulnerability exists in the Cryptography Next Generation (CNG) kernel-mode driver (cng.sys) when it fails to properly validate and enforce impersonation levels.</p> <p>An attacker could exploit this vulnerability by convincing a user to run a specially crafted application that is designed to cause CNG to improperly validate impersonation levels, potentially allowing the attacker to gain access to information beyond the access level of the local user.</p> <p>The security update addresses the vulnerability by correcting how the kernel-mode driver validates and enforces impersonation levels.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1511 for 32-bit Systems | 10586.1478 | [KB4088779](https://patchblox.com/security/data/fix/microsoft/kb4088779.md) | Mar 13, 2018 |
| Microsoft | Windows 10 Version 1511 for x64-based Systems | 10586.1478 | [KB4088779](https://patchblox.com/security/data/fix/microsoft/kb4088779.md) | Mar 13, 2018 |
| Microsoft | Windows 10 Version 1607 for 32-bit Systems |  | [KB4088787](https://patchblox.com/security/data/fix/microsoft/kb4088787.md) | Mar 13, 2018 |
| Microsoft | Windows 10 Version 1607 for x64-based Systems |  | [KB4088787](https://patchblox.com/security/data/fix/microsoft/kb4088787.md) | Mar 13, 2018 |
| Microsoft | Windows 10 Version 1703 for 32-bit Systems |  | [KB4088782](https://patchblox.com/security/data/fix/microsoft/kb4088782.md) | Mar 13, 2018 |
| Microsoft | Windows 10 Version 1703 for x64-based Systems |  | [KB4088782](https://patchblox.com/security/data/fix/microsoft/kb4088782.md) | Mar 13, 2018 |
| Microsoft | Windows 10 Version 1709 for 32-bit Systems | 16299.309 | [KB4088776](https://patchblox.com/security/data/fix/microsoft/kb4088776.md) | Mar 13, 2018 |
| Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.309 | [KB4088776](https://patchblox.com/security/data/fix/microsoft/kb4088776.md) | Mar 13, 2018 |
| Microsoft | Windows 10 for 32-bit Systems | 10240.17797 | [KB4088786](https://patchblox.com/security/data/fix/microsoft/kb4088786.md) | Mar 13, 2018 |
| Microsoft | Windows 10 for x64-based Systems | 10240.17797 | [KB4088786](https://patchblox.com/security/data/fix/microsoft/kb4088786.md) | Mar 13, 2018 |
| Microsoft | Windows Server 2016 |  | [KB4088787](https://patchblox.com/security/data/fix/microsoft/kb4088787.md) | Mar 13, 2018 |
| Microsoft | Windows Server 2016 (Server Core installation) |  | [KB4088787](https://patchblox.com/security/data/fix/microsoft/kb4088787.md) | Mar 13, 2018 |
| Microsoft | Windows Server, version 1709  (Server Core Installation) | 16299.309 | [KB4088776](https://patchblox.com/security/data/fix/microsoft/kb4088776.md) | Mar 13, 2018 |

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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