# KB5025271: April 2023 security update KB5025271, released April 11, 2023, fixes 40 CVEs across 4 products. 2 of them are being exploited (CVE-2023-28252); 2 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported. - Web page: https://patchblox.com/security/fix/microsoft/kb5025271 - Platform: Microsoft - Released: Apr 11, 2023 - Priority: Patch now (Closes CVE-2023-28252, exploited (CISA KEV, ransomware)) - CVEs: 40, exploited: 2, on CISA KEV: 2 - Vendor advisory: https://support.microsoft.com/help/5025271 ## 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-2023-28252](https://patchblox.com/security/data/cve/CVE-2023-28252.md) | Patch now | Windows Common Log File System Driver | 7.8 | 0.4889 | CISA KEV, Ransomware | | [CVE-2023-28229](https://patchblox.com/security/data/cve/CVE-2023-28229.md) | Patch now | Windows CNG Key Isolation Service | 7.0 | 0.0167 | CISA KEV | | [CVE-2023-21554](https://patchblox.com/security/data/cve/CVE-2023-21554.md) | Urgent | Windows Message Queuing | 9.8 | 0.9541 | More likely | | [CVE-2023-28231](https://patchblox.com/security/data/cve/CVE-2023-28231.md) | Urgent | Windows DHCP Server | 8.8 | 0.3662 | More likely | | [CVE-2023-28219](https://patchblox.com/security/data/cve/CVE-2023-28219.md) | Urgent | Windows Layer 2 Tunneling Protocol | 8.1 | 0.1498 | More likely | | [CVE-2023-28220](https://patchblox.com/security/data/cve/CVE-2023-28220.md) | Urgent | Windows Layer 2 Tunneling Protocol | 8.1 | 0.1498 | More likely | | [CVE-2023-28218](https://patchblox.com/security/data/cve/CVE-2023-28218.md) | Urgent | Windows Ancillary Function Driver for WinSock | 7.0 | 0.1240 | More likely | | [CVE-2023-28227](https://patchblox.com/security/data/cve/CVE-2023-28227.md) | Urgent | Microsoft Bluetooth Driver | 7.5 | 0.0659 | More likely | | [CVE-2023-28266](https://patchblox.com/security/data/cve/CVE-2023-28266.md) | Urgent | Windows Common Log File System Driver | 5.5 | 0.0436 | More likely | | [CVE-2023-24912](https://patchblox.com/security/data/cve/CVE-2023-24912.md) | Urgent | Microsoft Graphics Component | 7.8 | 0.0357 | More likely | | [CVE-2023-28250](https://patchblox.com/security/data/cve/CVE-2023-28250.md) | Urgent | Windows PGM | 9.8 | 0.0203 | | | [CVE-2023-28232](https://patchblox.com/security/data/cve/CVE-2023-28232.md) | Urgent | Windows Point-to-Point Tunneling Protocol | 7.5 | 0.0091 | | | [CVE-2023-28302](https://patchblox.com/security/data/cve/CVE-2023-28302.md) | High | Windows Active Directory | 7.5 | 0.9257 | | | [CVE-2023-21769](https://patchblox.com/security/data/cve/CVE-2023-21769.md) | High | Windows Message Queuing | 7.5 | 0.8867 | | | [CVE-2023-28244](https://patchblox.com/security/data/cve/CVE-2023-28244.md) | High | Windows Kerberos | 8.1 | 0.0292 | | | [CVE-2023-28293](https://patchblox.com/security/data/cve/CVE-2023-28293.md) | High | Windows Kernel | 7.8 | 0.0287 | | | [CVE-2023-28241](https://patchblox.com/security/data/cve/CVE-2023-28241.md) | High | Windows Secure Socket Tunneling Protocol (SSTP) | 7.5 | 0.0199 | | | [CVE-2023-28217](https://patchblox.com/security/data/cve/CVE-2023-28217.md) | High | Windows Network Address Translation (NAT) | 7.5 | 0.0194 | | | [CVE-2023-21727](https://patchblox.com/security/data/cve/CVE-2023-21727.md) | High | Windows RPC API | 8.8 | 0.0164 | | | [CVE-2023-28268](https://patchblox.com/security/data/cve/CVE-2023-28268.md) | High | Windows Netlogon | 8.1 | 0.0149 | | | [CVE-2023-28275](https://patchblox.com/security/data/cve/CVE-2023-28275.md) | High | Microsoft WDAC OLE DB provider for SQL | 8.8 | 0.0146 | | | [CVE-2023-28254](https://patchblox.com/security/data/cve/CVE-2023-28254.md) | High | Microsoft Windows DNS | 7.2 | 0.0144 | | | [CVE-2023-28240](https://patchblox.com/security/data/cve/CVE-2023-28240.md) | High | Windows Network Load Balancing | 8.8 | 0.0075 | | | [CVE-2023-28222](https://patchblox.com/security/data/cve/CVE-2023-28222.md) | High | Windows Kernel | 7.1 | 0.0068 | | | [CVE-2023-28272](https://patchblox.com/security/data/cve/CVE-2023-28272.md) | High | Windows Kernel | 7.8 | 0.0049 | | | [CVE-2023-28216](https://patchblox.com/security/data/cve/CVE-2023-28216.md) | High | Windows ALPC | 7.0 | 0.0037 | | | [CVE-2023-21729](https://patchblox.com/security/data/cve/CVE-2023-21729.md) | Routine | Windows RPC API | 4.3 | 0.0135 | | | [CVE-2023-28271](https://patchblox.com/security/data/cve/CVE-2023-28271.md) | Routine | Windows Kernel | 5.5 | 0.0116 | | | [CVE-2023-28223](https://patchblox.com/security/data/cve/CVE-2023-28223.md) | Routine | Microsoft Windows DNS | 6.6 | 0.0113 | | | [CVE-2023-28278](https://patchblox.com/security/data/cve/CVE-2023-28278.md) | Routine | Microsoft Windows DNS | 6.6 | 0.0085 | | | [CVE-2023-28305](https://patchblox.com/security/data/cve/CVE-2023-28305.md) | Routine | Microsoft Windows DNS | 6.6 | 0.0085 | | | [CVE-2023-28306](https://patchblox.com/security/data/cve/CVE-2023-28306.md) | Routine | Microsoft Windows DNS | 6.6 | 0.0085 | | | [CVE-2023-28307](https://patchblox.com/security/data/cve/CVE-2023-28307.md) | Routine | Microsoft Windows DNS | 6.6 | 0.0085 | | | [CVE-2023-28308](https://patchblox.com/security/data/cve/CVE-2023-28308.md) | Routine | Microsoft Windows DNS | 6.6 | 0.0085 | | | [CVE-2023-28255](https://patchblox.com/security/data/cve/CVE-2023-28255.md) | Routine | Microsoft Windows DNS | 6.6 | 0.0084 | | | [CVE-2023-28256](https://patchblox.com/security/data/cve/CVE-2023-28256.md) | Routine | Microsoft Windows DNS | 6.6 | 0.0084 | | | [CVE-2023-28298](https://patchblox.com/security/data/cve/CVE-2023-28298.md) | Routine | Windows Kernel | 5.5 | 0.0057 | | | [CVE-2023-28253](https://patchblox.com/security/data/cve/CVE-2023-28253.md) | Routine | Windows Kernel | 5.5 | 0.0056 | | | [CVE-2023-28276](https://patchblox.com/security/data/cve/CVE-2023-28276.md) | Routine | Windows Group Policy | 4.4 | 0.0046 | | | [CVE-2023-28228](https://patchblox.com/security/data/cve/CVE-2023-28228.md) | Routine | Windows RDP Client | 5.5 | 0.0045 | | --- Data as of 2026-11-07T12:40:37Z 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 Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.