Microsoft · Security update · October 14, 2025
KB5066876: October 2025 security update
KB5066876, released October 14, 2025, fixes 37 CVEs across 2 products. 2 of them are being exploited (CVE-2025-24990); 2 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.
Patch now2 on CISA KEV1 publicly disclosedUnsupported product
CVEs closed
37
1 rated Critical
Exploited
2
CVE-2025-24990
Exploitation more likely
1
Microsoft's assessment
Highest EPSS
0.0651
93rd percentile
Priority of the 37 CVEs
Patch now 2
Urgent 2
High 24
Routine 9
Applies to
| Product |
|---|
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 |
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) |
CVEs this fix closes
| Priority | CVE | Component | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| Patch now | CVE-2025-24990 | Agere Windows Modem Driver | Elevation of Privilege | 7.8 | 0.0651 | KEVExploited |
| Patch now | CVE-2025-59230 | Windows Remote Access Connection Manager | Elevation of Privilege | 7.8 | 0.0272 | KEVExploited |
| Urgent | CVE-2016-9535 | Microsoft Graphics Component | Remote Code Execution | 4.0 | 0.0473 | Exploitation Unlikely |
| Urgent | CVE-2025-24052 | Agere Windows Modem Driver | Elevation of Privilege | 7.8 | 0.0254 | DisclosedMore likely |
| High | CVE-2025-59295 | Internet Explorer | Remote Code Execution | 8.8 | 0.0190 | Exploitation Less Likely |
| High | CVE-2025-58726 | Windows SMB Server | Elevation of Privilege | 7.5 | 0.0104 | Exploitation Less Likely |
| High | CVE-2025-59282 | Inbox COM Objects | Remote Code Execution | 7.0 | 0.0061 | Exploitation Unlikely |
| High | CVE-2025-58718 | Remote Desktop Client | Remote Code Execution | 8.8 | 0.0060 | Exploitation Less Likely |
| High | CVE-2025-59208 | Windows MapUrlToZone | Information Disclosure | 7.1 | 0.0050 | Exploitation Less Likely |
| High | CVE-2025-25004 | Microsoft PowerShell | Elevation of Privilege | 7.3 | 0.0049 | Exploitation Less Likely |
| High | CVE-2025-58732 | Inbox COM Objects | Remote Code Execution | 7.0 | 0.0047 | Exploitation Unlikely |
| High | CVE-2025-58735 | Inbox COM Objects | Remote Code Execution | 7.0 | 0.0047 | Exploitation Unlikely |
| High | CVE-2025-59201 | Network Connection Status Indicator (NCSI) | Elevation of Privilege | 7.8 | 0.0046 | Exploitation Less Likely |
| High | CVE-2025-55701 | Microsoft Windows | Elevation of Privilege | 7.8 | 0.0041 | Exploitation Less Likely |
| High | CVE-2025-59242 | Windows Ancillary Function Driver for WinSock | Elevation of Privilege | 7.8 | 0.0041 | Exploitation Less Likely |
| High | CVE-2025-59277 | Windows Authentication Methods | Elevation of Privilege | 7.8 | 0.0039 | Exploitation Less Likely |
| High | CVE-2025-58730 | Inbox COM Objects | Remote Code Execution | 7.0 | 0.0035 | Exploitation Unlikely |
| High | CVE-2025-58733 | Inbox COM Objects | Remote Code Execution | 7.0 | 0.0035 | Exploitation Unlikely |
| High | CVE-2025-58736 | Inbox COM Objects | Remote Code Execution | 7.0 | 0.0035 | Exploitation Unlikely |
| High | CVE-2025-59187 | Windows Kernel | Elevation of Privilege | 7.8 | 0.0031 | Exploitation Less Likely |
| High | CVE-2025-55678 | Windows DirectX | Elevation of Privilege | 7.0 | 0.0030 | Exploitation Less Likely |
| High | CVE-2025-59275 | Windows Authentication Methods | Elevation of Privilege | 7.8 | 0.0028 | Exploitation Less Likely |
| High | CVE-2025-59278 | Windows Authentication Methods | Elevation of Privilege | 7.8 | 0.0028 | Exploitation Less Likely |
| High | CVE-2025-58714 | Windows Ancillary Function Driver for WinSock | Elevation of Privilege | 7.8 | 0.0028 | Exploitation Unlikely |
| High | CVE-2025-55335 | Windows NTFS | Elevation of Privilege | 7.4 | 0.0027 | Exploitation Less Likely |
Showing 1 to 25 of 37
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