# CVE-2019-0540: Microsoft Office Security Feature Bypass Vulnerability

CVE-2019-0540 is fixed in 11 products on 1 platform, first by KB4092465, released February 12, 2019. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2019-0540
- Priority: Urgent
- CVSS: n/a (Important)
- EPSS: 0.1083
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation More Likely
- Published: Feb 12, 2019
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-0540

## Description

<p>A security feature bypass vulnerability exists when Microsoft Office does not validate URLs.</p> <p>An attacker could send a victim a specially crafted file, which could trick the victim into entering credentials. An attacker who successfully exploited this vulnerability could perform a phishing attack.</p> <p>The update addresses the vulnerability by ensuring Microsoft Office properly validates URLs.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft Excel Viewer |  | [KB4092465](https://patchblox.com/security/data/fix/microsoft/kb4092465.md) | Feb 12, 2019 |
| Microsoft | Microsoft Office 2010 Service Pack 2 (32-bit editions) |  | [KB4462174](https://patchblox.com/security/data/fix/microsoft/kb4462174.md) | Feb 12, 2019 |
| Microsoft | Microsoft Office 2010 Service Pack 2 (64-bit editions) |  | [KB4462174](https://patchblox.com/security/data/fix/microsoft/kb4462174.md) | Feb 12, 2019 |
| Microsoft | Microsoft Office 2013 RT Service Pack 1 |  | [KB4462138](https://patchblox.com/security/data/fix/microsoft/kb4462138.md) | Feb 12, 2019 |
| Microsoft | Microsoft Office 2013 Service Pack 1 (32-bit editions) |  | [KB4462138](https://patchblox.com/security/data/fix/microsoft/kb4462138.md) | Feb 12, 2019 |
| Microsoft | Microsoft Office 2013 Service Pack 1 (64-bit editions) |  | [KB4462138](https://patchblox.com/security/data/fix/microsoft/kb4462138.md) | Feb 12, 2019 |
| Microsoft | Microsoft Office 2016 (32-bit edition) |  | [KB4462146](https://patchblox.com/security/data/fix/microsoft/kb4462146.md) | Feb 12, 2019 |
| Microsoft | Microsoft Office 2016 (64-bit edition) |  | [KB4462146](https://patchblox.com/security/data/fix/microsoft/kb4462146.md) | Feb 12, 2019 |
| Microsoft | Microsoft Office Compatibility Pack Service Pack 3 |  | [KB4092465](https://patchblox.com/security/data/fix/microsoft/kb4092465.md) | Feb 12, 2019 |
| Microsoft | Microsoft Office Word Viewer |  | [KB4462154](https://patchblox.com/security/data/fix/microsoft/kb4462154.md) | Feb 12, 2019 |
| Microsoft | Microsoft PowerPoint Viewer |  | [KB4092465](https://patchblox.com/security/data/fix/microsoft/kb4092465.md) | Feb 12, 2019 |

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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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