# KB5087054: May 2026 security update

KB5087054, released May 18, 2026, fixes 2 CVEs across 2 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/microsoft/kb5087054
- Platform: Microsoft
- Released: May 18, 2026
- Priority: High (Closes CVE-2026-35433, high severity)
- CVEs: 2, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/5087054

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2 for ARM64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-and-4.8.1-on-windows-11-version-24h2-for-arm64-based-systems.md) |  |  |
| [Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-and-4.8.1-on-windows-11-version-24h2-for-x64-based-systems.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-35433](https://patchblox.com/security/data/cve/CVE-2026-35433.md) | High | .NET | 7.3 | 0.0077 |  |
| [CVE-2026-32177](https://patchblox.com/security/data/cve/CVE-2026-32177.md) | High | .NET | 7.3 | 0.0064 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo