# KB5055596: April 2025 security update KB5055596, released April 8, 2025, fixes 39 CVEs across 4 products. One of them is being exploited (CVE-2025-29824); 1 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported. - Web page: https://patchblox.com/security/fix/microsoft/kb5055596 - Platform: Microsoft - Released: Apr 8, 2025 - Priority: Patch now (Closes CVE-2025-29824, exploited (CISA KEV, ransomware)) - CVEs: 39, exploited: 1, on CISA KEV: 1 - Vendor advisory: https://support.microsoft.com/help/5055596 ## 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-2025-29824](https://patchblox.com/security/data/cve/CVE-2025-29824.md) | Patch now | Windows Common Log File System Driver | 7.8 | 0.1925 | CISA KEV, Ransomware | | [CVE-2025-26670](https://patchblox.com/security/data/cve/CVE-2025-26670.md) | Urgent | Windows LDAP - Lightweight Directory Access Protocol | 8.1 | 0.1105 | More likely | | [CVE-2025-26663](https://patchblox.com/security/data/cve/CVE-2025-26663.md) | Urgent | Windows LDAP - Lightweight Directory Access Protocol | 8.1 | 0.0179 | More likely | | [CVE-2025-26686](https://patchblox.com/security/data/cve/CVE-2025-26686.md) | Urgent | Windows TCP/IP | 7.5 | 0.0142 | | | [CVE-2025-27727](https://patchblox.com/security/data/cve/CVE-2025-27727.md) | Urgent | Windows Installer | 7.8 | 0.0104 | More likely | | [CVE-2025-21204](https://patchblox.com/security/data/cve/CVE-2025-21204.md) | High | Windows Update Stack | 7.8 | 0.0713 | | | [CVE-2025-27740](https://patchblox.com/security/data/cve/CVE-2025-27740.md) | High | Windows Active Directory Certificate Services | 8.8 | 0.0352 | | | [CVE-2025-26673](https://patchblox.com/security/data/cve/CVE-2025-26673.md) | High | Windows LDAP - Lightweight Directory Access Protocol | 7.5 | 0.0273 | | | [CVE-2025-29810](https://patchblox.com/security/data/cve/CVE-2025-29810.md) | High | Active Directory Domain Services | 7.5 | 0.0262 | | | [CVE-2025-27469](https://patchblox.com/security/data/cve/CVE-2025-27469.md) | High | Windows LDAP - Lightweight Directory Access Protocol | 7.5 | 0.0257 | | | [CVE-2025-26647](https://patchblox.com/security/data/cve/CVE-2025-26647.md) | High | Windows Kerberos | 8.8 | 0.0230 | | | [CVE-2025-26641](https://patchblox.com/security/data/cve/CVE-2025-26641.md) | High | Windows Cryptographic Services | 7.5 | 0.0227 | | | [CVE-2025-27473](https://patchblox.com/security/data/cve/CVE-2025-27473.md) | High | Windows HTTP.sys | 7.5 | 0.0227 | | | [CVE-2025-27477](https://patchblox.com/security/data/cve/CVE-2025-27477.md) | High | Windows Telephony Service | 8.8 | 0.0161 | | | [CVE-2025-26669](https://patchblox.com/security/data/cve/CVE-2025-26669.md) | High | Windows Routing and Remote Access Service (RRAS) | 8.8 | 0.0153 | | | [CVE-2025-21205](https://patchblox.com/security/data/cve/CVE-2025-21205.md) | High | Windows Telephony Service | 8.8 | 0.0139 | | | [CVE-2025-21221](https://patchblox.com/security/data/cve/CVE-2025-21221.md) | High | Windows Telephony Service | 8.8 | 0.0139 | | | [CVE-2025-21222](https://patchblox.com/security/data/cve/CVE-2025-21222.md) | High | Windows Telephony Service | 8.8 | 0.0139 | | | [CVE-2025-27481](https://patchblox.com/security/data/cve/CVE-2025-27481.md) | High | Windows Telephony Service | 8.8 | 0.0127 | | | [CVE-2025-26668](https://patchblox.com/security/data/cve/CVE-2025-26668.md) | High | Windows Routing and Remote Access Service (RRAS) | 7.5 | 0.0126 | | | [CVE-2025-26687](https://patchblox.com/security/data/cve/CVE-2025-26687.md) | High | Windows Win32K - GRFX | 7.5 | 0.0116 | | | [CVE-2025-27484](https://patchblox.com/security/data/cve/CVE-2025-27484.md) | High | Windows Universal Plug and Play (UPnP) Device Host | 7.5 | 0.0083 | | | [CVE-2025-27741](https://patchblox.com/security/data/cve/CVE-2025-27741.md) | High | Windows NTFS | 7.8 | 0.0082 | | | [CVE-2025-27737](https://patchblox.com/security/data/cve/CVE-2025-27737.md) | High | Windows Security Zone Mapping | 8.6 | 0.0078 | | | [CVE-2025-27733](https://patchblox.com/security/data/cve/CVE-2025-27733.md) | High | Windows NTFS | 7.8 | 0.0074 | | | [CVE-2025-26679](https://patchblox.com/security/data/cve/CVE-2025-26679.md) | High | RPC Endpoint Mapper Service | 7.8 | 0.0059 | | | [CVE-2025-27478](https://patchblox.com/security/data/cve/CVE-2025-27478.md) | High | Windows Local Security Authority (LSA) | 7.0 | 0.0046 | | | [CVE-2025-27732](https://patchblox.com/security/data/cve/CVE-2025-27732.md) | High | Windows Win32K - GRFX | 7.0 | 0.0035 | | | [CVE-2025-26665](https://patchblox.com/security/data/cve/CVE-2025-26665.md) | High | Windows upnphost.dll | 7.0 | 0.0034 | | | [CVE-2025-21191](https://patchblox.com/security/data/cve/CVE-2025-21191.md) | High | Windows Local Security Authority (LSA) | 7.0 | 0.0032 | | | [CVE-2025-21197](https://patchblox.com/security/data/cve/CVE-2025-21197.md) | Routine | Windows NTFS | 6.5 | 0.0332 | | | [CVE-2025-26664](https://patchblox.com/security/data/cve/CVE-2025-26664.md) | Routine | Windows Routing and Remote Access Service (RRAS) | 6.5 | 0.0185 | | | [CVE-2025-26667](https://patchblox.com/security/data/cve/CVE-2025-26667.md) | Routine | Windows Routing and Remote Access Service (RRAS) | 6.5 | 0.0185 | | | [CVE-2025-26672](https://patchblox.com/security/data/cve/CVE-2025-26672.md) | Routine | Windows Routing and Remote Access Service (RRAS) | 6.5 | 0.0185 | | | [CVE-2025-27474](https://patchblox.com/security/data/cve/CVE-2025-27474.md) | Routine | Windows Routing and Remote Access Service (RRAS) | 6.5 | 0.0185 | | | [CVE-2025-21203](https://patchblox.com/security/data/cve/CVE-2025-21203.md) | Routine | Windows Routing and Remote Access Service (RRAS) | 6.5 | 0.0169 | | | [CVE-2025-26676](https://patchblox.com/security/data/cve/CVE-2025-26676.md) | Routine | Windows Routing and Remote Access Service (RRAS) | 6.5 | 0.0166 | | | [CVE-2025-27471](https://patchblox.com/security/data/cve/CVE-2025-27471.md) | Routine | Microsoft Streaming Service | 5.9 | 0.0132 | | | [CVE-2025-27742](https://patchblox.com/security/data/cve/CVE-2025-27742.md) | Routine | Windows NTFS | 5.5 | 0.0088 | | --- Data as of 2026-11-07T18:46:35Z 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 Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data 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.