# KB5002877: June 2026 security update

KB5002877, released June 9, 2026, fixes 7 CVEs across 2 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/microsoft/kb5002877
- Platform: Microsoft
- Released: Jun 9, 2026
- Priority: High (Closes CVE-2026-44822, high severity)
- CVEs: 7, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/5002877

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft Excel 2016 (32-bit edition)](https://patchblox.com/security/data/product/microsoft/microsoft-excel-2016-32-bit-edition.md) |  |  |
| [Microsoft Excel 2016 (64-bit edition)](https://patchblox.com/security/data/product/microsoft/microsoft-excel-2016-64-bit-edition.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-44822](https://patchblox.com/security/data/cve/CVE-2026-44822.md) | High | Microsoft Office Excel | 8.2 | 0.0052 |  |
| [CVE-2026-44817](https://patchblox.com/security/data/cve/CVE-2026-44817.md) | High | Microsoft Office Excel | 7.8 | 0.0037 |  |
| [CVE-2026-44820](https://patchblox.com/security/data/cve/CVE-2026-44820.md) | High | Microsoft Office Excel | 7.8 | 0.0037 |  |
| [CVE-2026-44823](https://patchblox.com/security/data/cve/CVE-2026-44823.md) | High | Microsoft Office Excel | 7.8 | 0.0037 |  |
| [CVE-2026-45469](https://patchblox.com/security/data/cve/CVE-2026-45469.md) | High | Microsoft Office Excel | 7.8 | 0.0037 |  |
| [CVE-2026-44818](https://patchblox.com/security/data/cve/CVE-2026-44818.md) | High | Microsoft Office Excel | 7.0 | 0.0026 |  |
| [CVE-2026-45455](https://patchblox.com/security/data/cve/CVE-2026-45455.md) | Routine | Microsoft Office Excel | 3.3 | 0.0063 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo