# CVE-2020-1018: Microsoft Dynamics Business Central/NAV Information Disclosure

CVE-2020-1018 is fixed in 6 products on 1 platform, first by KB4549677, released April 14, 2020. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2020-1018
- Priority: High
- CVSS: n/a (Important)
- EPSS: 0.0631
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Apr 14, 2020
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1018

## Description

<p>An information disclosure vulnerability exists when Microsoft Dynamics Business Central/NAV on-premise does not properly hide the value of a masked field when showing the records as a chart page.</p> <p>The attacker who successfully exploited the vulnerability could see the information that are in a masked field.</p> <p>The security update addresses the vulnerability by updating the rendering engine the Windows client to properly detect masked fields and render the content as masked.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Dynamics 365 Business Central Spring 2019 Update |  | [KB4549677](https://patchblox.com/security/data/fix/microsoft/kb4549677.md) | Apr 14, 2020 |
| Microsoft | Microsoft Dynamics 365 BC On Premise |  | [KB4549676](https://patchblox.com/security/data/fix/microsoft/kb4549676.md) | Apr 14, 2020 |
| Microsoft | Microsoft Dynamics NAV 2015 |  | [KB4557700](https://patchblox.com/security/data/fix/microsoft/kb4557700.md) | Apr 14, 2020 |
| Microsoft | Microsoft Dynamics NAV 2016 |  | [KB4549673](https://patchblox.com/security/data/fix/microsoft/kb4549673.md) | Apr 14, 2020 |
| Microsoft | Microsoft Dynamics NAV 2017 |  | [KB4549674](https://patchblox.com/security/data/fix/microsoft/kb4549674.md) | Apr 14, 2020 |
| Microsoft | Microsoft Dynamics NAV 2018 |  | [KB4549675](https://patchblox.com/security/data/fix/microsoft/kb4549675.md) | Apr 14, 2020 |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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