# CVE-2021-27059: Microsoft Office Remote Code Execution Vulnerability

CVE-2021-27059 is fixed in 7 products on 1 platform, first by KB4504703, released March 12, 2021. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021. Patch Radar priority: Patch now.

- Web page: https://patchblox.com/security/cve/CVE-2021-27059
- Priority: Patch now
- CVSS: 7.6 (Important)
- EPSS: 0.0608
- CISA KEV: listed Nov 3, 2021, federal due date Nov 17, 2021
- Exploited (vendor report): yes
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Detected
- Published: Mar 12, 2021
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27059

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft Office 2010 Service Pack 2 (32-bit editions) |  | [KB4504703](https://patchblox.com/security/data/fix/microsoft/kb4504703.md) | Mar 12, 2021 |
| Microsoft | Microsoft Office 2010 Service Pack 2 (64-bit editions) |  | [KB4504703](https://patchblox.com/security/data/fix/microsoft/kb4504703.md) | Mar 12, 2021 |
| Microsoft | Microsoft Office 2013 RT Service Pack 1 |  | [KB4493228](https://patchblox.com/security/data/fix/microsoft/kb4493228.md) | Mar 12, 2021 |
| Microsoft | Microsoft Office 2013 Service Pack 1 (32-bit editions) |  | [KB4493228](https://patchblox.com/security/data/fix/microsoft/kb4493228.md) | Mar 12, 2021 |
| Microsoft | Microsoft Office 2013 Service Pack 1 (64-bit editions) |  | [KB4493228](https://patchblox.com/security/data/fix/microsoft/kb4493228.md) | Mar 12, 2021 |
| Microsoft | Microsoft Office 2016 (32-bit edition) |  | [KB4493225](https://patchblox.com/security/data/fix/microsoft/kb4493225.md) | Mar 12, 2021 |
| Microsoft | Microsoft Office 2016 (64-bit edition) |  | [KB4493225](https://patchblox.com/security/data/fix/microsoft/kb4493225.md) | Mar 12, 2021 |

---

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.