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May 12, 2026-KB5087052 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system, version 23H2

🗓️ 12 May 2026 00:00:00Reported by MicrosoftType 
mskb
 mskb🔗 support.microsoft.com👁 45 Views

May 12, 2026 update fixes two elevation of privilege CVEs for Dot Net Framework 3.5 and 4.8.1 on Windows Server 23H2.

Related
ReporterTitlePublishedViews
Family
ATTACKERKB		CVE-2026-32177
12 May 202616:58
–attackerkb
ATTACKERKB		CVE-2026-35433
12 May 202616:58
–attackerkb
Tenable Nessus		Amazon Linux 2023 : aspnetcore-runtime-9.0, aspnetcore-runtime-dbg-9.0, aspnetcore-targeting-pack-9.0 (ALAS2023-2026-1802)
8 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : aspnetcore-runtime-10.0, aspnetcore-runtime-dbg-10.0, aspnetcore-targeting-pack-10.0 (ALAS2023-2026-1803)
8 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : aspnetcore-runtime-8.0, aspnetcore-runtime-dbg-8.0, aspnetcore-targeting-pack-8.0 (ALAS2023-2026-1804)
8 Jun 202600:00
–nessus
Tenable Nessus		Fedora 44 : dotnet10.0 (2026-0d598afbf9)
25 May 202600:00
–nessus
Tenable Nessus		Fedora 44 : dotnet8.0 (2026-223f4839fc)
25 May 202600:00
–nessus
Tenable Nessus		Fedora 43 : dotnet8.0 (2026-3e509b1444)
25 May 202600:00
–nessus
Tenable Nessus		Fedora 43 : dotnet9.0 (2026-6013769170)
25 May 202600:00
–nessus
Tenable Nessus		Fedora 42 : dotnet9.0 (2026-85758358ff)
25 May 202600:00
–nessus
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12 May 2026 00:00Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.17.3
EPSS0.00662
SSVC
Dot Net Framework 3.5Dot Net Framework 4.8.1Windows Server 23H2CVE 2026 32177CVE 2026 35433
45