Patch Tuesday Updates: May 2026

Good day, everyone!

Here's a list of the updates released in this month's Patch Tuesday.

New OS Security Updates:

44283 - 2026-05 Servicing Stack Update for Windows 10 Version 1607 for x64-based Systems (KB5088064)
44284 - 2026-05 Servicing Stack Update for Windows Server 2016 for x64-based Systems (KB5088064)
44285 - 2026-05 Servicing Stack Update for Windows 10 Version 1607 for x86-based Systems (KB5088064)
44286 - 2026-05 Cumulative Update for Windows 10 Version 1607 for x64-based Systems (KB5087537)
44287 - 2026-05 Cumulative Update for Windows Server 2016 for x64-based Systems (KB5087537)
44288 - 2026-05 Cumulative Update for Windows 10 Version 1607 for x86-based Systems (KB5087537)
44289 - 2026-05 Cumulative Update for Windows 10 Version 1809 for x64-based Systems (KB5087538)
44290 - 2026-05 Cumulative Update for Windows Server 2019 for x64-based Systems (KB5087538)
44291 - 2026-05 Cumulative Update for Windows 10 Version 1809 for x86-based Systems (KB5087538)
44292 - 2026-05 Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5087544)
44293 - 2026-05 Cumulative Update for Windows 10 Version 21H2 for x86-based Systems (KB5087544)
44294 - 2026-05 Cumulative Update for Windows 10 Version 22H2 for x64-based Systems (KB5087544) (ESU)
44295 - 2026-05 Cumulative Update for Windows 10 Version 22H2 for x86-based Systems (KB5087544) (ESU)
44296 - 2026-05 Cumulative Update for Windows 11, version 23H2 for arm64-based Systems (KB5087420)
44297 - 2026-05 Cumulative Update for Windows 11, version 23H2 for x64-based Systems (KB5087420)
44298 - 2026-05 Cumulative Update for Windows 11, version 24H2 for arm64-based Systems (KB5089549) (26100.8457)
44299 - 2026-05 Cumulative Update for Windows 11, version 24H2 for x64-based Systems (KB5089549) (26100.8457)
44300 - 2026-05 Cumulative Update for Windows 11, version 25H2 for arm64-based Systems (KB5089549) (26200.8457)
44301 - 2026-05 Cumulative Update for Windows 11, version 25H2 for x64-based Systems (KB5089549) (26200.8457)
44304 - 2026-05 Cumulative Update for Windows 11, version 26H1 for x64-based Systems (KB5089548) (28000.2113)
44305 - 2026-05 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5087545)
44308 - 2026-05 Cumulative Update for Microsoft server operating system version 24H2 for x64-based Systems (KB5087539)
44311 - 2026-05 Cumulative Update for Microsoft server operating system version 23H2 for x64-based Systems (KB5087541)
44312 - 2026-05 Cumulative Update for .NET Framework 4.8 for Windows 10 Version 1607 for x64 (KB5087065)
44313 - 2026-05 Cumulative Update for .NET Framework 4.8 for Windows Server 2016 for x64 (KB5087065)
44314 - 2026-05 Cumulative Update for .NET Framework 4.8 for Windows 10 Version 1607 (KB5087065)
44315 - KB5088864, 2026-05 Cumulative Update for .NET Framework 3.5 and 4.7.2 for Windows 10 Version 1809 for x64 (KB5087061)
44316 - KB5088864, 2026-05 Cumulative Update for .NET Framework 3.5 and 4.7.2 for Windows Server 2019 for x64 (KB5087061)
44317 - KB5088864, 2026-05 Cumulative Update for .NET Framework 3.5 and 4.7.2 for Windows 10 Version 1809 (KB5087061)
44318 - KB5088864, 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 1809 for x64 (KB5087066)
44319 - KB5088864, 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server 2019 for x64 (KB5087066)
44320 - KB5088864, 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 1809 (KB5087066)
44321 - KB5088859, 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 10 Version 21H2 for x64 (KB5087053)
44322 - KB5088859, 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 10 Version 21H2 (KB5087053)
44323 - KB5088859, 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 21H2 for x64 (KB5087064)
44324 - KB5088859, 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 21H2 (KB5087064)
44325 - KB5088863, 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 10 Version 22H2 for x64 (KB5087053) (ESU)
44326 - KB5088863, 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 10 Version 22H2 (KB5087053) (ESU)
44327 - KB5088863, 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 22H2 for x64 (KB5087064) (ESU)
44328 - KB5088863, 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 22H2 (KB5087064) (ESU)
44329 - 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 23H2 for arm64 (KB5087058)
44330 - 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 23H2 for x64 (KB5087058)
44331 - 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2 for arm64 (KB5087054)
44332 - 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2 for x64 (KB5087054)
44333 - 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 25H2 for arm64 (KB5087051)
44334 - 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 25H2 for x64 (KB5087051)
44335 - 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 26H1 for arm64 (KB5087055)
44336 - KB5088862, 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system version 21H2 for x64 (KB5087059)
44337 - KB5088862, 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8 for Microsoft server operating system version 21H2 for x64 (KB5087068)
44338 - 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system version 24H2 for arm64 (KB5087051)
44339 - 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system version 24H2 for x64 (KB5087051)
44341 - 2026-05 Security Monthly Quality Rollup for Windows Server 2012 for x64-based Systems (KB5087470) (ESU)
44342 - 2026-05 Security Monthly Quality Rollup for Windows Server 2012 R2 for x64-based Systems (KB5087471) (ESU)
44344 - KB5088860, 2026-05 Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 for x64 (KB5087048) (ESU)
44345 - KB5088860, 2026-05 Security and Quality Rollup for .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Server 2012 for x64 (KB5087062) (ESU)
44346 - KB5088860, 2026-05 Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 for x64 (KB5087067) (ESU)
44347 - KB5088861, 2026-05 Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 R2 for x64 (KB5087049) (ESU)
44348 - KB5088861, 2026-05 Security and Quality Rollup for .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Server 2012 R2 for x64 (KB5087063) (ESU)
44349 - KB5088861, 2026-05 Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 R2 for x64 (KB5087069) (ESU)
44352 - Update for .NET Hosting (8.0.27) (KB5093447)
44353 - Update for AspNet Core (x64) (8.0.27) (KB5093447)
44354 - Update for AspNet Core (x86) (8.0.27) (KB5093447)
44355 - Update for .NET Desktop Runtime (x64) (8.0.27) (KB5093447)
44356 - Update for .NET Desktop Runtime (x86) (8.0.27) (KB5093447)
44357 - Update for .NET Runtime (x64) (8.0.27) (KB5093447)
44358 - Update for .NET Runtime (x86) (8.0.27) (KB5093447)
44359 - Update for .NET SDK (x64) (8.0.421) (KB5093447)
44360 - Update for .NET SDK (x86) (8.0.421) (KB5093447)
44361 - Update for .NET SDK (x64) (8.0.127) (KB5093447)
44362 - Update for .NET SDK (x86) (8.0.127) (KB5093447)
44363 - Update for .NET Hosting (10.0.8) (KB5093446)
44364 - Update for AspNet Core (x64) (10.0.8) (KB5093446)
44365 - Update for AspNet Core (x86) (10.0.8) (KB5093446)
44366 - Update for .NET Desktop Runtime (x64) (10.0.8) (KB5093446)
44367 - Update for .NET Desktop Runtime (x86) (10.0.8) (KB5093446)
44368 - Update for .NET Runtime (x64) (10.0.8) (KB5093446)
44369 - Update for .NET Runtime (x86) (10.0.8) (KB5093446)
44370 - Update for .NET SDK (x86) (10.0.204) (KB5093446)
44371 - Update for .NET SDK (x64) (10.0.204) (KB5093446)
44372 - Update for .NET SDK (x86) (10.0.108) (KB5093446)
44373 - Update for .NET SDK (x64) (10.0.108) (KB5093446)
44374 - Update for .NET Hosting (9.0.16) (KB5093448)
44375 - Update for AspNet Core (x64) (9.0.16) (KB5093448)
44376 - Update for AspNet Core (x86) (9.0.16) (KB5093448)
44377 - Update for .NET Desktop Runtime (x64) (9.0.16) (KB5093448)
44378 - Update for .NET Desktop Runtime (x86) (9.0.16) (KB5093448)
44379 - Update for .NET Runtime (x64) (9.0.16) (KB5093448)
44380 - Update for .NET Runtime (x86) (9.0.16) (KB5093448)
44381 - Update for .NET SDK (x86) (9.0.117) (KB5093448)
44382 - Update for .NET SDK (x64) (9.0.117) (KB5093448)
44383 - Update for .NET SDK (x86) (9.0.314) (KB5093448)
44384 - Update for .NET SDK (x64) (9.0.314) (KB5093448)
44385 - Microsoft Malicious Software Removal Tool x64 - May 2026 (KB890830)
44386 - Microsoft Malicious Software Removal Tool - May 2026 (KB890830)