# CVE-2021-28449: Microsoft Office Remote Code Execution Vulnerability

CVE-2021-28449 is fixed in 14 products on 1 platform, first by KB3017810, released April 13, 2021. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-28449
- Priority: High
- CVSS: 7.8 (Important)
- EPSS: 0.0269
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Apr 13, 2021
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-28449

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft Excel 2010 Service Pack 2 (32-bit editions) |  | [KB3017810](https://patchblox.com/security/data/fix/microsoft/kb3017810.md) | Apr 13, 2021 |
| Microsoft | Microsoft Excel 2010 Service Pack 2 (64-bit editions) |  | [KB3017810](https://patchblox.com/security/data/fix/microsoft/kb3017810.md) | Apr 13, 2021 |
| Microsoft | Microsoft Excel 2013 RT Service Pack 1 |  | [KB4504735](https://patchblox.com/security/data/fix/microsoft/kb4504735.md) | Apr 13, 2021 |
| Microsoft | Microsoft Excel 2013 Service Pack 1 (32-bit editions) |  | [KB4504735](https://patchblox.com/security/data/fix/microsoft/kb4504735.md) | Apr 13, 2021 |
| Microsoft | Microsoft Excel 2013 Service Pack 1 (64-bit editions) |  | [KB4504735](https://patchblox.com/security/data/fix/microsoft/kb4504735.md) | Apr 13, 2021 |
| Microsoft | Microsoft Excel 2016 (32-bit edition) |  | [KB4504721](https://patchblox.com/security/data/fix/microsoft/kb4504721.md) | Apr 13, 2021 |
| Microsoft | Microsoft Excel 2016 (64-bit edition) |  | [KB4504721](https://patchblox.com/security/data/fix/microsoft/kb4504721.md) | Apr 13, 2021 |
| Microsoft | Microsoft Office 2010 Service Pack 2 (32-bit editions) |  | [KB2553491](https://patchblox.com/security/data/fix/microsoft/kb2553491.md) | Apr 13, 2021 |
| Microsoft | Microsoft Office 2010 Service Pack 2 (32-bit editions) |  | [KB2589361](https://patchblox.com/security/data/fix/microsoft/kb2589361.md) | Apr 13, 2021 |
| Microsoft | Microsoft Office 2010 Service Pack 2 (32-bit editions) |  | [KB4504738](https://patchblox.com/security/data/fix/microsoft/kb4504738.md) | Apr 13, 2021 |
| Microsoft | Microsoft Office 2010 Service Pack 2 (64-bit editions) |  | [KB2553491](https://patchblox.com/security/data/fix/microsoft/kb2553491.md) | Apr 13, 2021 |
| Microsoft | Microsoft Office 2010 Service Pack 2 (64-bit editions) |  | [KB2589361](https://patchblox.com/security/data/fix/microsoft/kb2589361.md) | Apr 13, 2021 |
| Microsoft | Microsoft Office 2010 Service Pack 2 (64-bit editions) |  | [KB4504738](https://patchblox.com/security/data/fix/microsoft/kb4504738.md) | Apr 13, 2021 |
| Microsoft | Microsoft Office 2013 RT Service Pack 1 |  | [KB4504726](https://patchblox.com/security/data/fix/microsoft/kb4504726.md) | Apr 13, 2021 |
| Microsoft | Microsoft Office 2013 Service Pack 1 (32-bit editions) |  | [KB4504726](https://patchblox.com/security/data/fix/microsoft/kb4504726.md) | Apr 13, 2021 |
| Microsoft | Microsoft Office 2013 Service Pack 1 (32-bit editions) |  | [KB3178643](https://patchblox.com/security/data/fix/microsoft/kb3178643.md) | Apr 13, 2021 |
| Microsoft | Microsoft Office 2013 Service Pack 1 (32-bit editions) |  | [KB3178639](https://patchblox.com/security/data/fix/microsoft/kb3178639.md) | Apr 13, 2021 |
| Microsoft | Microsoft Office 2013 Service Pack 1 (64-bit editions) |  | [KB4504726](https://patchblox.com/security/data/fix/microsoft/kb4504726.md) | Apr 13, 2021 |
| Microsoft | Microsoft Office 2013 Service Pack 1 (64-bit editions) |  | [KB3178643](https://patchblox.com/security/data/fix/microsoft/kb3178643.md) | Apr 13, 2021 |
| Microsoft | Microsoft Office 2013 Service Pack 1 (64-bit editions) |  | [KB3178639](https://patchblox.com/security/data/fix/microsoft/kb3178639.md) | Apr 13, 2021 |
| Microsoft | Microsoft Office 2016 (32-bit edition) |  | [KB4504722](https://patchblox.com/security/data/fix/microsoft/kb4504722.md) | Apr 13, 2021 |
| Microsoft | Microsoft Office 2016 (64-bit edition) |  | [KB4504722](https://patchblox.com/security/data/fix/microsoft/kb4504722.md) | Apr 13, 2021 |

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Data as of 2026-11-08T13:06:02Z 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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