# CVE-2020-1493: Microsoft Outlook Information Disclosure Vulnerability

CVE-2020-1493 is fixed in 7 products on 1 platform, first by KB4484497, released August 11, 2020. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2020-1493
- Priority: High
- CVSS: n/a (Important)
- EPSS: 0.0730
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Aug 11, 2020
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1493

## Description

<p>An information disclosure vulnerability exists when attaching files to Outlook messages. This vulnerability could potentially allow users to share attached files such that they are accessible by anonymous users where they should be restricted to specific users.</p> <p>To exploit this vulnerability, an attacker would have to attach a file as a link to an email. The email could then be shared with individuals that should not have access to the files, ignoring the default organizational setting.</p> <p>The security update addresses the vulnerability by correcting how Outlook handles file attachment links.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft Outlook 2010 Service Pack 2 (32-bit editions) |  | [KB4484497](https://patchblox.com/security/data/fix/microsoft/kb4484497.md) | Aug 11, 2020 |
| Microsoft | Microsoft Outlook 2010 Service Pack 2 (64-bit editions) |  | [KB4484497](https://patchblox.com/security/data/fix/microsoft/kb4484497.md) | Aug 11, 2020 |
| Microsoft | Microsoft Outlook 2013 RT Service Pack 1 |  | [KB4484486](https://patchblox.com/security/data/fix/microsoft/kb4484486.md) | Aug 11, 2020 |
| Microsoft | Microsoft Outlook 2013 Service Pack 1 (32-bit editions) |  | [KB4484486](https://patchblox.com/security/data/fix/microsoft/kb4484486.md) | Aug 11, 2020 |
| Microsoft | Microsoft Outlook 2013 Service Pack 1 (64-bit editions) |  | [KB4484486](https://patchblox.com/security/data/fix/microsoft/kb4484486.md) | Aug 11, 2020 |
| Microsoft | Microsoft Outlook 2016 (32-bit edition) |  | [KB4484475](https://patchblox.com/security/data/fix/microsoft/kb4484475.md) | Aug 11, 2020 |
| Microsoft | Microsoft Outlook 2016 (64-bit edition) |  | [KB4484475](https://patchblox.com/security/data/fix/microsoft/kb4484475.md) | Aug 11, 2020 |

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Data as of 2026-11-08T00:53:09Z 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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