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
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