# KB5014261: May 2022 security update

KB5014261, released May 10, 2022, fixes 1 CVE across 4 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/microsoft/kb5014261
- Platform: Microsoft
- Released: May 10, 2022
- Priority: High (Closes CVE-2022-21978, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/5014261

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft Exchange Server 2016 Cumulative Update 22](https://patchblox.com/security/data/product/microsoft/microsoft-exchange-server-2016-cumulative-update-22.md) |  |  |
| [Microsoft Exchange Server 2016 Cumulative Update 23](https://patchblox.com/security/data/product/microsoft/microsoft-exchange-server-2016-cumulative-update-23.md) |  |  |
| [Microsoft Exchange Server 2019 Cumulative Update 11](https://patchblox.com/security/data/product/microsoft/microsoft-exchange-server-2019-cumulative-update-11.md) |  |  |
| [Microsoft Exchange Server 2019 Cumulative Update 12](https://patchblox.com/security/data/product/microsoft/microsoft-exchange-server-2019-cumulative-update-12.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2022-21978](https://patchblox.com/security/data/cve/CVE-2022-21978.md) | High | Microsoft Exchange Server | 8.2 | 0.0087 |  |

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Data as of 2026-11-07T06:34:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo