# KB5002846: March 2026 security update

KB5002846, released March 10, 2026, fixes 4 CVEs in Office Online Server. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/microsoft/kb5002846
- Platform: Microsoft
- Released: Mar 10, 2026
- Priority: High (Closes CVE-2026-26108, high severity)
- CVEs: 4, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/5002846

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Office Online Server](https://patchblox.com/security/data/product/microsoft/office-online-server.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-26108](https://patchblox.com/security/data/cve/CVE-2026-26108.md) | High | Microsoft Office Excel | 7.8 | 0.0055 |  |
| [CVE-2026-26107](https://patchblox.com/security/data/cve/CVE-2026-26107.md) | High | Microsoft Office Excel | 7.8 | 0.0050 |  |
| [CVE-2026-26112](https://patchblox.com/security/data/cve/CVE-2026-26112.md) | High | Microsoft Office Excel | 7.8 | 0.0049 |  |
| [CVE-2026-26109](https://patchblox.com/security/data/cve/CVE-2026-26109.md) | High | Microsoft Office Excel | 8.4 | 0.0047 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo