Microsoft · Security update · April 8, 2025
KB5055518: April 2025 cumulative update for Windows 10 21H2
KB5055518, released April 8, 2025, fixes 61 CVEs across 8 products. One of them is being exploited (CVE-2025-29824); 1 on CISA KEV. Patch Radar priority: Patch now.
Patch now1 on CISA KEVKnown ransomware use1 publicly disclosed
CVEs closed
61
4 rated Critical
Exploited
1
CVE-2025-29824
Exploitation more likely
4
Microsoft's assessment
Highest EPSS
0.1925
97th percentile
Priority of the 61 CVEs
Patch now 1
Urgent 6
High 42
Routine 12
Applies to
CVEs this fix closes
| Priority | CVE | Component | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| Patch now | CVE-2025-29824 | Windows Common Log File System Driver | Elevation of Privilege | 7.8 | 0.1925 | KEVRansomwareExploited |
| Urgent | CVE-2025-26670 | Windows LDAP - Lightweight Directory Access Protocol | Remote Code Execution | 8.1 | 0.1105 | More likely |
| Urgent | CVE-2025-29809 | Windows Kerberos | Security Feature Bypass | 7.1 | 0.0426 | More likely |
| Urgent | CVE-2025-26663 | Windows LDAP - Lightweight Directory Access Protocol | Remote Code Execution | 8.1 | 0.0179 | More likely |
| Urgent | CVE-2025-27491 | Windows Hyper-V | Remote Code Execution | 7.1 | 0.0143 | Exploitation Less Likely |
| Urgent | CVE-2025-26686 | Windows TCP/IP | Remote Code Execution | 7.5 | 0.0142 | Exploitation Less Likely |
| Urgent | CVE-2025-27727 | Windows Installer | Elevation of Privilege | 7.8 | 0.0104 | More likely |
| High | CVE-2025-21204 | Windows Update Stack | Elevation of Privilege | 7.8 | 0.0713 | Exploitation Less Likely |
| High | CVE-2025-26673 | Windows LDAP - Lightweight Directory Access Protocol | Denial of Service | 7.5 | 0.0273 | Exploitation Less Likely |
| High | CVE-2025-29810 | Active Directory Domain Services | Elevation of Privilege | 7.5 | 0.0262 | Exploitation Less Likely |
| High | CVE-2025-27469 | Windows LDAP - Lightweight Directory Access Protocol | Denial of Service | 7.5 | 0.0257 | Exploitation Less Likely |
| High | CVE-2025-26641 | Windows Cryptographic Services | Denial of Service | 7.5 | 0.0227 | Exploitation Less Likely |
| High | CVE-2025-27473 | Windows HTTP.sys | Denial of Service | 7.5 | 0.0227 | Exploitation Less Likely |
| High | CVE-2025-27477 | Windows Telephony Service | Remote Code Execution | 8.8 | 0.0161 | Exploitation Less Likely |
| High | CVE-2025-26669 | Windows Routing and Remote Access Service (RRAS) | Information Disclosure | 8.8 | 0.0153 | Exploitation Less Likely |
| High | CVE-2025-27487 | Remote Desktop Client | Remote Code Execution | 8.0 | 0.0152 | Exploitation Less Likely |
| High | CVE-2025-21205 | Windows Telephony Service | Remote Code Execution | 8.8 | 0.0139 | Exploitation Less Likely |
| High | CVE-2025-21221 | Windows Telephony Service | Remote Code Execution | 8.8 | 0.0139 | Exploitation Less Likely |
| High | CVE-2025-21222 | Windows Telephony Service | Remote Code Execution | 8.8 | 0.0139 | Exploitation Less Likely |
| High | CVE-2025-27481 | Windows Telephony Service | Remote Code Execution | 8.8 | 0.0127 | Exploitation Less Likely |
| High | CVE-2025-26668 | Windows Routing and Remote Access Service (RRAS) | Remote Code Execution | 7.5 | 0.0126 | Exploitation Less Likely |
| High | CVE-2025-26687 | Windows Win32K - GRFX | Elevation of Privilege | 7.5 | 0.0116 | Exploitation Less Likely |
| High | CVE-2025-27729 | Windows Shell | Remote Code Execution | 7.8 | 0.0083 | Exploitation Less Likely |
| High | CVE-2025-27484 | Windows Universal Plug and Play (UPnP) Device Host | Elevation of Privilege | 7.5 | 0.0083 | Exploitation Less Likely |
| High | CVE-2025-27737 | Windows Security Zone Mapping | Security Feature Bypass | 8.6 | 0.0078 | Exploitation Less Likely |
Showing 1 to 25 of 61
1Next
Patch Radar data is free to use with attribution. Terms and how to credit it.
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.