Patch tracker / Products / Microsoft .NET Framework 3.5 on Windows 11 Version 26H1

Microsoft .NET Framework 3.5 on Windows 11 Version 26H1: vulnerabilities and security updates

Every CVE affecting Microsoft .NET Framework 3.5 on Windows 11 Version 26H1 and the Microsoft update (KB) that fixes it, ranked by real-world risk. Actively exploited (CISA KEV) first, then EPSS exploit probability, on top of CVSS severity.

CVEs
13
Updates (KBs)
7
Actively exploited (KEV)
0
Critical Severity
3

CVEs affecting Microsoft .NET Framework 3.5 on Windows 11 Version 26H1

CVESeverityCVSSEPSSStatus
CVE-2026-62872Critical9.8--
CVE-2026-65810Critical9.8--
CVE-2026-70354Critical9.8--
CVE-2026-62897High8.8--
CVE-2026-62899High7.8--
CVE-2026-62900High7.8--
CVE-2026-62901High7.8--
CVE-2026-62902High7.8--
CVE-2026-62909High7.8--
CVE-2026-58641High7.8--
CVE-2026-62871High7.8--
CVE-2026-62886High7.8--
CVE-2026-62898High7.8--

Updates (KBs) for Microsoft .NET Framework 3.5 on Windows 11 Version 26H1

UpdateReleasedSeverityCVSSEPSSCVEsStatus
KB51206982026-08-11High8.8-4-
KB51207032026-08-11High8.8-4-
KB51207112026-08-11High8.8-4-
KB51207472026-08-11High8.8-4-
KB51221042026-08-11High7.8-11-
KB51221052026-08-11High7.8-11-
KB51221062026-08-11High7.8-11-

Ranked across all products on the Microsoft patch tracker and the CVE and vulnerability management reference. Browse every product: product index.

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New to a term on this page? CVE, KB, KEV, CVSS, and EPSS are each explained once, on the Senserva security lexicon. Reference: Microsoft CVE and vulnerability management and the Microsoft patching guide.
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