# KB5026427: May 2023 security update

KB5026427, released May 9, 2023, fixes 12 CVEs across 4 products. One of them is being exploited (CVE-2023-29336); 1 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/microsoft/kb5026427
- Platform: Microsoft
- Released: May 9, 2023
- Priority: Patch now (Closes CVE-2023-29336, exploited (CISA KEV))
- CVEs: 12, exploited: 1, on CISA KEV: 1
- Vendor advisory: https://support.microsoft.com/help/5026427

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Windows Server 2008 for 32-bit Systems Service Pack 2](https://patchblox.com/security/data/product/microsoft/windows-server-2008-for-32-bit-systems-service-pack-2.md) |  |  |
| [Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-2008-for-32-bit-systems-service-pack-2-server-core-installation.md) |  |  |
| [Windows Server 2008 for x64-based Systems Service Pack 2](https://patchblox.com/security/data/product/microsoft/windows-server-2008-for-x64-based-systems-service-pack-2.md) |  |  |
| [Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-2008-for-x64-based-systems-service-pack-2-server-core-installation.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2023-29336](https://patchblox.com/security/data/cve/CVE-2023-29336.md) | Patch now | Windows Win32K | 7.8 | 0.4119 | CISA KEV |
| [CVE-2023-29325](https://patchblox.com/security/data/cve/CVE-2023-29325.md) | Urgent | Windows OLE | 8.1 | 0.8389 | Disclosed |
| [CVE-2023-24943](https://patchblox.com/security/data/cve/CVE-2023-24943.md) | Urgent | Windows PGM | 9.8 | 0.0468 |  |
| [CVE-2023-29324](https://patchblox.com/security/data/cve/CVE-2023-29324.md) | Urgent | Windows MSHTML Platform | 6.5 | 0.0284 | More likely |
| [CVE-2023-28283](https://patchblox.com/security/data/cve/CVE-2023-28283.md) | Urgent | Windows LDAP - Lightweight Directory Access Protocol | 8.1 | 0.0097 |  |
| [CVE-2023-24903](https://patchblox.com/security/data/cve/CVE-2023-24903.md) | Urgent | Windows Secure Socket Tunneling Protocol (SSTP) | 8.1 | 0.0092 |  |
| [CVE-2023-24940](https://patchblox.com/security/data/cve/CVE-2023-24940.md) | High | Windows PGM | 7.5 | 0.0517 |  |
| [CVE-2023-24942](https://patchblox.com/security/data/cve/CVE-2023-24942.md) | High | Windows Remote Procedure Call Runtime | 7.5 | 0.0190 |  |
| [CVE-2023-24904](https://patchblox.com/security/data/cve/CVE-2023-24904.md) | High | Windows Installer | 7.1 | 0.0062 |  |
| [CVE-2023-24900](https://patchblox.com/security/data/cve/CVE-2023-24900.md) | Routine | Windows NTLM | 5.9 | 0.0123 |  |
| [CVE-2023-24945](https://patchblox.com/security/data/cve/CVE-2023-24945.md) | Routine | Windows iSCSI Target Service | 5.5 | 0.0056 |  |
| [CVE-2023-28251](https://patchblox.com/security/data/cve/CVE-2023-28251.md) | Routine | Windows Secure Boot | 5.5 | 0.0045 |  |

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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