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.NET 9.0 installed on Windows: vulnerabilities and security updates

Every CVE affecting .NET 9.0 installed on Windows 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
18
Updates (KBs)
39
Actively exploited (KEV)
0
Critical Severity
0

CVEs affecting .NET 9.0 installed on Windows

CVESeverityCVSSEPSSStatus
CVE-2026-70354High7.86.2%-
CVE-2026-69522High8.81.8%-
CVE-2026-45490High7.82.5%-
CVE-2026-62886High7.81.7%-
CVE-2026-45591High7.52.5%-
CVE-2026-32175High7.52.4%-
CVE-2026-42899High7.52.4%-
CVE-2026-62871High7.81.1%-
CVE-2026-62909High7.81.1%-
CVE-2026-35433High7.32.4%-
CVE-2026-32177High7.32.4%-
CVE-2026-62898High7.51.1%-
CVE-2026-62901High7.51.1%-
CVE-2026-62897High7.01.1%-
CVE-2026-45491Medium6.22.5%-
CVE-2026-62902Medium6.51.1%-
CVE-2026-62899Medium5.91.1%-
CVE-2026-62900Medium5.91.1%-

Updates (KBs) for .NET 9.0 installed on Windows

UpdateReleasedSeverityCVSSEPSSCVEsStatus
KB51260432026-09-08High8.80.8%2-
KB51260442026-09-08High8.80.8%2-
KB51260452026-09-08High8.80.8%2-
KB51260462026-09-08High8.80.8%2-
KB51260472026-09-08High8.80.8%2-
KB51260482026-09-08High8.80.8%2-
KB51260492026-09-08High8.80.8%2-
KB51260502026-09-08High8.80.8%2-
KB51260512026-09-08High8.80.8%2-
KB51260522026-09-08High8.80.8%2-
KB51260532026-09-08High8.80.8%2-
KB51264212026-09-08High8.80.8%2-
KB51264222026-09-08High8.80.8%2-
KB51264242026-09-08High8.80.8%2-
KB50971482026-06-09High7.82.5%3-
KB50971492026-06-09High7.82.5%3-
KB50971502026-06-09High7.82.5%3-
KB50934462026-05-12High7.52.4%4-
KB50934472026-05-12High7.52.4%4-
KB50934482026-05-12High7.52.4%4-
KB51221042026-08-11High7.81.1%10-
KB51221052026-08-11High7.81.1%10-
KB50870482026-05-12High7.30.7%2-
KB50870492026-05-12High7.30.7%2-
KB50870512026-05-12High7.30.7%2-
KB50870532026-05-12High7.30.7%2-
KB50870542026-05-12High7.30.7%2-
KB50870552026-05-12High7.30.7%2-
KB50870582026-05-12High7.30.7%2-
KB50870592026-05-12High7.30.7%2-
KB50870612026-05-12High7.30.7%2-
KB50870632026-05-12High7.30.7%2-
KB50870642026-05-12High7.30.7%2-
KB50870652026-05-12High7.30.7%2-
KB50870662026-05-12High7.30.7%2-
KB50870672026-05-12High7.30.7%2-
KB50870682026-05-12High7.30.7%2-
KB50870622026-05-12High7.30.5%1-
KB50870692026-05-12High7.30.5%1-

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

Most searched on Senserva right now

KB5120708 download and what it fixes KB5126052: the full CVE list KB5120238 install notes and severity KB5099540 download and what it fixes KB5099538 install notes and severity KB5122876: patch details KB5120994: patch details KB5120242 download and what it fixes KB5122882: the full CVE list KB5124008 install notes and severity
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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