Patch tracker / Products / Windows 11 version 26H1

Windows 11 version 26H1: vulnerabilities and security updates

Every CVE affecting 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
168
Updates (KBs)
9
Actively exploited (KEV)
0
Critical Severity
4

CVEs affecting Windows 11 version 26H1

CVESeverityCVSSEPSSStatus
CVE-2026-33829Critical9.856%-
CVE-2026-33824Critical9.856%-
CVE-2026-27906Critical9.856%-
CVE-2026-32220Critical9.856%-
CVE-2026-32157High8.856%-
CVE-2026-32225High8.856%-
CVE-2026-26167High8.856%-
CVE-2026-26178High8.856%-
CVE-2026-27928High8.756%-
CVE-2026-32091High8.456%-
CVE-2026-32221High8.456%-
CVE-2026-32162High8.456%-
CVE-2026-33827High8.156%-
CVE-2026-33826High8.056%-
CVE-2026-27912High8.056%-
CVE-2026-26160High7.856%-
CVE-2026-26162High7.856%-
CVE-2026-26180High7.856%-
CVE-2026-26183High7.856%-
CVE-2026-27915High7.856%-
CVE-2026-27919High7.856%-
CVE-2026-26159High7.856%-
CVE-2026-26163High7.856%-
CVE-2026-26176High7.856%-
CVE-2026-27909High7.856%-
CVE-2026-27910High7.856%-
CVE-2026-27914High7.856%-
CVE-2026-27916High7.856%-
CVE-2026-27920High7.856%-
CVE-2026-27923High7.856%-
CVE-2026-32077High7.856%-
CVE-2026-32183High7.856%-
CVE-2026-26168High7.856%-
CVE-2026-32089High7.856%-
CVE-2026-32090High7.856%-
CVE-2026-32154High7.856%-
CVE-2026-33098High7.856%-
CVE-2026-26156High7.856%-
CVE-2026-26170High7.856%-
CVE-2026-27911High7.856%-
CVE-2026-32164High7.856%-
CVE-2026-26161High7.856%-
CVE-2026-26179High7.856%-
CVE-2026-26181High7.856%-
CVE-2026-27907High7.856%-
CVE-2026-27918High7.856%-
CVE-2026-27927High7.856%-
CVE-2026-32152High7.856%-
CVE-2026-32158High7.856%-
CVE-2026-32159High7.856%-
CVE-2026-32160High7.856%-
CVE-2026-32165High7.856%-
CVE-2026-32222High7.856%-
CVE-2026-26153High7.856%-
CVE-2026-26172High7.856%-
CVE-2026-26184High7.856%-
CVE-2026-32069High7.856%-
CVE-2026-32074High7.856%-
CVE-2026-32076High7.856%-
CVE-2026-32163High7.856%-
CVE-2026-33101High7.856%-
CVE-2026-32078High7.856%-
CVE-2026-32153High7.856%-
CVE-2026-27913High7.756%-
CVE-2026-26154High7.556%-
CVE-2026-32071High7.556%-
CVE-2026-33096High7.556%-
CVE-2026-32156High7.456%-
CVE-2026-32149High7.356%-
CVE-2026-26151High7.156%-
CVE-2025-65018High7.156%-
CVE-2025-64720High7.156%-
CVE-2026-26174High7.056%-
CVE-2026-27908High7.056%-
CVE-2026-27917High7.056%-
CVE-2026-27921High7.056%-
CVE-2026-27929High7.056%-
CVE-2026-32073High7.056%-
CVE-2026-32075High7.056%-
CVE-2026-32082High7.056%-
CVE-2026-32083High7.056%-
CVE-2026-32087High7.056%-
CVE-2026-32093High7.056%-
CVE-2026-26152High7.056%-
CVE-2026-26173High7.056%-
CVE-2026-26177High7.056%-
CVE-2026-26182High7.056%-
CVE-2026-27922High7.056%-
CVE-2026-32068High7.056%-
CVE-2026-32070High7.056%-
CVE-2026-32086High7.056%-
CVE-2026-32150High7.056%-
CVE-2026-33099High7.056%-
CVE-2026-33100High7.056%-
CVE-2026-33104High7.056%-
CVE-2026-32080High7.056%-
CVE-2026-25184High7.056%-
CVE-2026-26165High7.056%-
CVE-2026-26166High7.056%-
CVE-2026-27926High7.056%-
CVE-2026-32195High7.056%-
CVE-2026-32219High7.056%-
CVE-2026-32224High7.056%-
CVE-2026-32223Medium6.856%-
CVE-2026-0390Medium6.756%-
CVE-2026-27925Medium6.556%-
CVE-2026-32151Medium6.556%-
CVE-2026-26155Medium6.556%-
CVE-2026-32072Medium6.256%-
CVE-2026-26169Medium6.156%-
CVE-2026-32088Medium6.156%-
CVE-2026-25250Medium6.056%-
CVE-2026-23670Medium5.756%-
CVE-2026-32217Medium5.556%-
CVE-2026-32212Medium5.556%-
CVE-2026-27930Medium5.556%-
CVE-2026-32084Medium5.556%-
CVE-2026-32214Medium5.556%-
CVE-2026-32081Medium5.556%-
CVE-2026-32085Medium5.556%-
CVE-2026-32079Medium5.556%-
CVE-2026-27931Medium5.556%-
CVE-2026-32181Medium5.556%-
CVE-2026-32215Medium5.556%-
CVE-2026-32216Medium5.556%-
CVE-2026-32218Medium5.556%-
CVE-2026-20806Medium5.556%-
CVE-2026-26175Medium4.656%-
CVE-2026-20928Medium4.656%-
CVE-2026-23669High8.84.7%-
CVE-2026-24283High8.84.7%-
CVE-2026-25177High8.84.7%-
CVE-2026-25188High8.84.7%-
CVE-2026-25172High8.04.7%-
CVE-2026-25173High8.04.7%-
CVE-2026-26111High8.04.7%-
CVE-2026-23672High7.84.7%-
CVE-2026-23673High7.84.7%-
CVE-2026-24287High7.84.7%-
CVE-2026-24290High7.84.7%-
CVE-2026-24291High7.84.7%-
CVE-2026-24292High7.84.7%-
CVE-2026-24294High7.84.7%-
CVE-2026-25165High7.84.7%-
CVE-2026-25174High7.84.7%-
CVE-2026-25176High7.84.7%-
CVE-2026-25187High7.84.7%-
CVE-2026-25190High7.84.7%-
CVE-2026-26128High7.84.7%-
CVE-2026-26132High7.84.7%-
CVE-2026-24293High7.84.7%-
CVE-2026-24289High7.84.7%-
CVE-2026-25181High7.54.7%-
CVE-2026-23674High7.54.7%-
CVE-2026-25167High7.44.7%-
CVE-2026-23671High7.04.7%-
CVE-2026-24285High7.04.7%-
CVE-2026-24295High7.04.7%-
CVE-2026-24296High7.04.7%-
CVE-2026-25170High7.04.7%-
CVE-2026-25171High7.04.7%-
CVE-2026-25178High7.04.7%-
CVE-2026-25179High7.04.7%-
CVE-2026-25168Medium6.24.7%-
CVE-2026-25169Medium6.24.7%-
CVE-2026-25180Medium5.54.7%-
CVE-2026-25186Medium5.54.7%-
CVE-2026-25185Medium5.34.7%-

Updates (KBs) for Windows 11 version 26H1

UpdateReleasedSeverityCVSSEPSSCVEsStatus
KB50821982026-04-14Critical9.856%87-
KB50837682026-04-14Critical9.856%119-
KB50787362026-03-10High8.84.7%39-
KB50787402026-03-10High8.84.7%39-
KB50821262026-04-14High8.83.5%61-
KB50821272026-04-14High8.83.5%58-
KB50845972026-03-10High8.00.9%3-
KB50828062026-04-14High7.80.3%1-
KB50787382026-03-10High7.51.2%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

KB5099540: the full CVE list KB5099538: patch details KB5094123: the full CVE list KB5099539 install notes and severity KB5101650: patch details CVE-2026-50522 exploit status KB5101001: the full CVE list CVE-2026-53412: severity and the patch KB5102334: the full CVE list KB5101010 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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