Microsoft · Security update · October 14, 2025

KB5066742: October 2025 security update

KB5066742, released October 14, 2025, fixes 1 CVE across 12 products. None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

HighUnsupported product
CVEs closed
1
None rated Critical
Exploited
0
None reported
Exploitation more likely
0
Vendor assessment
Highest EPSS
0.0074
54th percentile

Applies to

Product
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2
Microsoft .NET Framework 3.5 on Windows Server 2008 for 32-bit Systems Service Pack 2
Microsoft .NET Framework 3.5 on Windows Server 2008 for x64-based Systems Service Pack 2
Microsoft .NET Framework 4.6.2 on Windows Server 2008 for 32-bit Systems Service Pack 2
Microsoft .NET Framework 4.6.2 on Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
Microsoft .NET Framework 4.6.2 on Windows Server 2008 for x64-based Systems Service Pack 2
Microsoft .NET Framework 4.6.2 on Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)

CVEs this fix closes

PriorityCVEComponentImpactCVSSEPSSExploitation
High CVE-2025-55248 .NET, .NET Framework, Visual Studio Information Disclosure 8.5 0.0074 Exploitation Less Likely
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