# CVE-2018-8627: Microsoft Excel Information Disclosure Vulnerability

CVE-2018-8627 is fixed in 13 products on 1 platform, first by KB4461569, released December 11, 2018. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2018-8627
- Priority: High
- CVSS: n/a (Important)
- EPSS: 0.0862
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Dec 11, 2018
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-8627

## Description

<p>An information disclosure vulnerability exists when Microsoft Excel software reads out of bound memory due to an uninitialized variable, which could disclose the contents of memory. An attacker who successfully exploited the vulnerability could view out of bound memory.</p> <p>Exploitation of the vulnerability requires that a user open a specially crafted file with an affected version of Microsoft Excel software.</p> <p>The security update addresses the vulnerability by properly initializing the affected variable.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Excel Services on Microsoft SharePoint Server 2010 Service Pack 2 |  | [KB4461569](https://patchblox.com/security/data/fix/microsoft/kb4461569.md) | Dec 11, 2018 |
| Microsoft | Microsoft Excel 2010 Service Pack 2 (32-bit editions) |  | [KB4461577](https://patchblox.com/security/data/fix/microsoft/kb4461577.md) | Dec 11, 2018 |
| Microsoft | Microsoft Excel 2010 Service Pack 2 (64-bit editions) |  | [KB4461577](https://patchblox.com/security/data/fix/microsoft/kb4461577.md) | Dec 11, 2018 |
| Microsoft | Microsoft Excel 2013 RT Service Pack 1 |  | [KB4461559](https://patchblox.com/security/data/fix/microsoft/kb4461559.md) | Dec 11, 2018 |
| Microsoft | Microsoft Excel 2013 Service Pack 1 (32-bit editions) |  | [KB4461559](https://patchblox.com/security/data/fix/microsoft/kb4461559.md) | Dec 11, 2018 |
| Microsoft | Microsoft Excel 2013 Service Pack 1 (64-bit editions) |  | [KB4461559](https://patchblox.com/security/data/fix/microsoft/kb4461559.md) | Dec 11, 2018 |
| Microsoft | Microsoft Excel 2016 (32-bit edition) |  | [KB4461542](https://patchblox.com/security/data/fix/microsoft/kb4461542.md) | Dec 11, 2018 |
| Microsoft | Microsoft Excel 2016 (64-bit edition) |  | [KB4461542](https://patchblox.com/security/data/fix/microsoft/kb4461542.md) | Dec 11, 2018 |
| Microsoft | Microsoft Excel Viewer 2007 Service Pack 3 |  | [KB4461566](https://patchblox.com/security/data/fix/microsoft/kb4461566.md) | Dec 11, 2018 |
| Microsoft | Microsoft Office 2010 Service Pack 2 (32-bit editions) |  | [KB4461570](https://patchblox.com/security/data/fix/microsoft/kb4461570.md) | Dec 11, 2018 |
| Microsoft | Microsoft Office 2010 Service Pack 2 (64-bit editions) |  | [KB4461570](https://patchblox.com/security/data/fix/microsoft/kb4461570.md) | Dec 11, 2018 |
| Microsoft | Microsoft Office Compatibility Pack Service Pack 3 |  | [KB4461565](https://patchblox.com/security/data/fix/microsoft/kb4461565.md) | Dec 11, 2018 |
| Microsoft | Microsoft Office Online Server |  | [KB4011027](https://patchblox.com/security/data/fix/microsoft/kb4011027.md) | Dec 11, 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