# CVE-2024-21410: Microsoft Exchange Server Elevation of Privilege Vulnerability

CVE-2024-21410 is fixed in 3 products on 1 platform, first by KB5036386, released February 14, 2024. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on February 15, 2024. Patch Radar priority: Patch now.

- Web page: https://patchblox.com/security/cve/CVE-2024-21410
- Priority: Patch now
- CVSS: 9.8 (Critical)
- EPSS: 0.1266
- CISA KEV: listed Feb 15, 2024, federal due date Mar 7, 2024
- Exploited (vendor report): yes
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Detected
- Published: Feb 14, 2024
- Weakness: Improper Authentication
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21410

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 23 |  | [KB5036386](https://patchblox.com/security/data/fix/microsoft/kb5036386.md) | Feb 14, 2024 |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 13 |  | [KB5035606](https://patchblox.com/security/data/fix/microsoft/kb5035606.md) | Feb 14, 2024 |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 14 |  | [KB5035606](https://patchblox.com/security/data/fix/microsoft/kb5035606.md) | Feb 14, 2024 |

---

Data as of 2026-11-09T19:38:12Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo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.