Microsoft · Security update · April 19, 2022

KB5012123: April 2022 security update

KB5012123, released April 19, 2022, fixes 1 CVE across 2 products. None of them is reported as exploited. Patch Radar priority: High.

High

CVEs closed

None rated Critical

Exploited

None reported

Exploitation more likely

Vendor assessment

Highest EPSS

0.0361

89th percentile

Applies to

Product
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 (Server Core installation)

CVEs this fix closes

Priority	CVE	Component	Impact	CVSS	EPSS	Exploitation
High	CVE-2022-26832	.NET Framework	Denial of Service	7.5	0.0361	Exploitation Less Likely

Released the same day

KB5012117
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 20H2 for 32-bit Systems, Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 20H2 for ARM64-based Systems, Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 20H2 (Server Core Installation) and 6 more
KB5012118
Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems, Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems, Microsoft .NET Framework 4.8 on Windows Server 2016 and 1 more
KB5012120
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for 32-bit Systems, Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for ARM64-based Systems, Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for x64-based Systems
KB5012121
Microsoft .NET Framework 3.5 AND 4.8 on Windows 11 version 21H2 for ARM64-based Systems, Microsoft .NET Framework 3.5 AND 4.8 on Windows 11 version 21H2 for x64-based Systems
KB5012324
Microsoft .NET Framework 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1, Microsoft .NET Framework 3.5.1 on Windows 7 for x64-based Systems Service Pack 1, Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 and 13 more
KB5012325
Microsoft .NET Framework 3.5 on Windows Server 2012, Microsoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation), Microsoft .NET Framework 4.5.2 on Windows Server 2012 and 5 more
KB5012326
Microsoft .NET Framework 3.5 on Windows 8.1 for 32-bit systems, Microsoft .NET Framework 3.5 on Windows 8.1 for x64-based systems, Microsoft .NET Framework 3.5 on Windows Server 2012 R2 and 13 more
KB5012327
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 and 7 more
KB5012328
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems, Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for ARM64-based Systems, Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems and 6 more
KB5012329
Microsoft .NET Framework 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1, Microsoft .NET Framework 3.5.1 on Windows 7 for x64-based Systems Service Pack 1, Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 and 13 more
KB5012330
Microsoft .NET Framework 3.5 on Windows Server 2012, Microsoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation), Microsoft .NET Framework 4.5.2 on Windows Server 2012 and 5 more
KB5012331
Microsoft .NET Framework 4.5.2 on Windows 8.1 for 32-bit systems, Microsoft .NET Framework 4.5.2 on Windows 8.1 for x64-based systems, Microsoft .NET Framework 4.5.2 on Windows RT 8.1 and 12 more

Vendor advisory

https://support.microsoft.com/help/5012123

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