# KB5036386: February 2024 security update

KB5036386, released February 14, 2024, fixes 1 CVE in Microsoft Exchange Server 2016 Cumulative Update 23. One of them is being exploited (CVE-2024-21410); 1 on CISA KEV. Patch Radar priority: Patch now.

- Web page: https://patchblox.com/security/fix/microsoft/kb5036386
- Platform: Microsoft
- Released: Feb 14, 2024
- Priority: Patch now (Closes CVE-2024-21410, exploited (CISA KEV))
- CVEs: 1, exploited: 1, on CISA KEV: 1
- Vendor advisory: https://support.microsoft.com/help/5036386

## Applies to

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

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2024-21410](https://patchblox.com/security/data/cve/CVE-2024-21410.md) | Patch now | Microsoft Exchange Server | 9.8 | 0.1266 | CISA KEV |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo