# KB5002901: August 2026 security update

KB5002901, released August 11, 2026, fixes 17 CVEs across 2 products. None of them is reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/fix/microsoft/kb5002901
- Platform: Microsoft
- Released: Aug 11, 2026
- Priority: Urgent (Closes CVE-2026-64907, rated Critical)
- CVEs: 17, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/5002901

## Applies to

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

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-63525](https://patchblox.com/security/data/cve/CVE-2026-63525.md) | Urgent | Microsoft Office Word | 7.8 | 0.0047 |  |
| [CVE-2026-64907](https://patchblox.com/security/data/cve/CVE-2026-64907.md) | Urgent | Microsoft Office Word | 7.8 | 0.0047 |  |
| [CVE-2026-63527](https://patchblox.com/security/data/cve/CVE-2026-63527.md) | High | Microsoft Office Word | 7.8 | 0.0047 |  |
| [CVE-2026-64905](https://patchblox.com/security/data/cve/CVE-2026-64905.md) | High | Microsoft Office Word | 7.8 | 0.0047 |  |
| [CVE-2026-64915](https://patchblox.com/security/data/cve/CVE-2026-64915.md) | High | Microsoft Office Word | 7.8 | 0.0047 |  |
| [CVE-2026-70311](https://patchblox.com/security/data/cve/CVE-2026-70311.md) | High | Microsoft Office Word | 7.8 | 0.0047 |  |
| [CVE-2026-70105](https://patchblox.com/security/data/cve/CVE-2026-70105.md) | Routine | Microsoft Office Word | 6.5 | 0.0097 |  |
| [CVE-2026-63528](https://patchblox.com/security/data/cve/CVE-2026-63528.md) | Routine | Microsoft Office Word | 5.5 | 0.0054 |  |
| [CVE-2026-63530](https://patchblox.com/security/data/cve/CVE-2026-63530.md) | Routine | Microsoft Office Word | 5.5 | 0.0054 |  |
| [CVE-2026-63531](https://patchblox.com/security/data/cve/CVE-2026-63531.md) | Routine | Microsoft Office Word | 5.5 | 0.0054 |  |
| [CVE-2026-64917](https://patchblox.com/security/data/cve/CVE-2026-64917.md) | Routine | Microsoft Office Word | 5.5 | 0.0054 |  |
| [CVE-2026-70318](https://patchblox.com/security/data/cve/CVE-2026-70318.md) | Routine | Microsoft Office Excel | 5.5 | 0.0054 |  |
| [CVE-2026-63521](https://patchblox.com/security/data/cve/CVE-2026-63521.md) | Routine | Microsoft Office Word | 5.5 | 0.0044 |  |
| [CVE-2026-66806](https://patchblox.com/security/data/cve/CVE-2026-66806.md) | Routine | Microsoft Office Word | 5.5 | 0.0044 |  |
| [CVE-2026-66809](https://patchblox.com/security/data/cve/CVE-2026-66809.md) | Routine | Microsoft Office | 5.5 | 0.0044 |  |
| [CVE-2026-66810](https://patchblox.com/security/data/cve/CVE-2026-66810.md) | Routine | Microsoft Office Word | 5.5 | 0.0044 |  |
| [CVE-2026-70310](https://patchblox.com/security/data/cve/CVE-2026-70310.md) | Routine | Microsoft Office Word | 5.5 | 0.0044 |  |

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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