Windows 10 21H2

End of Life

Latest Release

KB Article KB5099539
Build 10.0.19044.7548
Released 2026-07-14
Age 17 days ago
CVEs Fixed 328
Exploited 0
Release Type Patch Tuesday
End of Support (Home/Pro) 2023-06-13
End of Support (Ent/Edu) 2024-06-11
Security Information
July 2026 Security Update 2026-07-14 10.0.19044.7548
Out of Support Patch Tuesday 328 CVEs
+35d
35 days since previous release  ·  Addresses 328 security issues
ℹ️ Addresses 328 security issues
Recommendation: Update to stay secure — security fixes available
KB Article
KB5099539
Build
10.0.19044.7548
Vulnerabilities
328
Days to Prev.
35
Supersedes
KB5094127
CVEs (328)
CVE-2026-33xx (1 CVE)
CVE-2026-41xx (1 CVE)
CVE-2026-44xx (1 CVE)
CVE-2026-47xx (2 CVEs)
CVE-2026-50xx (185 CVEs)
CVE-2026-50293 CVE-2026-50294 CVE-2026-50296 CVE-2026-50297 CVE-2026-50298 CVE-2026-50299 CVE-2026-50300 CVE-2026-50302 CVE-2026-50303 CVE-2026-50304 CVE-2026-50306 CVE-2026-50307 CVE-2026-50308 CVE-2026-50309 CVE-2026-50310 CVE-2026-50311 CVE-2026-50312 CVE-2026-50313 CVE-2026-50316 CVE-2026-50318 CVE-2026-50321 CVE-2026-50324 CVE-2026-50325 CVE-2026-50326 CVE-2026-50329 CVE-2026-50330 CVE-2026-50331 CVE-2026-50332 CVE-2026-50333 CVE-2026-50334 CVE-2026-50335 CVE-2026-50337 CVE-2026-50339 CVE-2026-50341 CVE-2026-50343 CVE-2026-50344 CVE-2026-50346 CVE-2026-50347 CVE-2026-50348 CVE-2026-50350 CVE-2026-50351 CVE-2026-50352 CVE-2026-50354 CVE-2026-50355 CVE-2026-50356 CVE-2026-50357 CVE-2026-50358 CVE-2026-50359 CVE-2026-50360 CVE-2026-50362 CVE-2026-50363 CVE-2026-50364 CVE-2026-50365 CVE-2026-50366 CVE-2026-50367 CVE-2026-50368 CVE-2026-50369 CVE-2026-50371 CVE-2026-50372 CVE-2026-50373 CVE-2026-50374 CVE-2026-50375 CVE-2026-50376 CVE-2026-50377 CVE-2026-50378 CVE-2026-50380 CVE-2026-50381 CVE-2026-50382 CVE-2026-50383 CVE-2026-50384 CVE-2026-50386 CVE-2026-50387 CVE-2026-50388 CVE-2026-50389 CVE-2026-50390 CVE-2026-50391 CVE-2026-50394 CVE-2026-50397 CVE-2026-50399 CVE-2026-50400 CVE-2026-50401 CVE-2026-50402 CVE-2026-50405 CVE-2026-50406 CVE-2026-50407 CVE-2026-50409 CVE-2026-50410 CVE-2026-50411 CVE-2026-50412 CVE-2026-50415 CVE-2026-50417 CVE-2026-50419 CVE-2026-50421 CVE-2026-50422 CVE-2026-50423 CVE-2026-50425 CVE-2026-50427 CVE-2026-50429 CVE-2026-50430 CVE-2026-50431 CVE-2026-50432 CVE-2026-50433 CVE-2026-50434 CVE-2026-50435 CVE-2026-50437 CVE-2026-50439 CVE-2026-50441 CVE-2026-50442 CVE-2026-50445 CVE-2026-50447 CVE-2026-50448 CVE-2026-50449 CVE-2026-50450 CVE-2026-50451 CVE-2026-50452 CVE-2026-50453 CVE-2026-50455 CVE-2026-50456 CVE-2026-50457 CVE-2026-50459 CVE-2026-50460 CVE-2026-50461 CVE-2026-50462 CVE-2026-50463 CVE-2026-50469 CVE-2026-50470 CVE-2026-50471 CVE-2026-50473 CVE-2026-50474 CVE-2026-50475 CVE-2026-50476 CVE-2026-50477 CVE-2026-50478 CVE-2026-50479 CVE-2026-50482 CVE-2026-50484 CVE-2026-50485 CVE-2026-50486 CVE-2026-50489 CVE-2026-50490 CVE-2026-50491 CVE-2026-50492 CVE-2026-50493 CVE-2026-50494 CVE-2026-50495 CVE-2026-50496 CVE-2026-50497 CVE-2026-50498 CVE-2026-50499 CVE-2026-50500 CVE-2026-50502 CVE-2026-50504 CVE-2026-50505 CVE-2026-50509 CVE-2026-50525 CVE-2026-50527 CVE-2026-50646 CVE-2026-50647 CVE-2026-50648 CVE-2026-50649 CVE-2026-50650 CVE-2026-50652 CVE-2026-50653 CVE-2026-50655 CVE-2026-50659 CVE-2026-50661 CVE-2026-50666 CVE-2026-50667 CVE-2026-50668 CVE-2026-50669 CVE-2026-50670 CVE-2026-50672 CVE-2026-50673 CVE-2026-50680 CVE-2026-50681 CVE-2026-50682 CVE-2026-50686 CVE-2026-50688 CVE-2026-50689 CVE-2026-50690 CVE-2026-50692 CVE-2026-50694 CVE-2026-50695 CVE-2026-50696 CVE-2026-50697
CVE-2026-55xx (2 CVEs)
June 2026 Security Update 2026-06-09 10.0.19044.7417
Out of Support Patch Tuesday 93 CVEs
+28d
28 days since previous release  ·  Addresses 93 security issues
ℹ️ Addresses 93 security issues
Recommendation: Update to stay secure — security fixes available
KB Article
KB5094127
Build
10.0.19044.7417
Vulnerabilities
93
Days to Prev.
28
Supersedes
KB5087544
CVEs (93)
CVE-2025-10xx (1 CVE)
CVE-2026-33xx (1 CVE)
CVE-2026-34xx (1 CVE)
CVE-2026-40xx (2 CVEs)
CVE-2026-41xx (2 CVEs)
CVE-2026-49xx (1 CVE)
CVE-2026-50xx (1 CVE)
CVE-2026-88xx (1 CVE)
April 2026 Security Update 2026-04-14 10.0.19044.7184
Out of Support Patch Tuesday 109 CVEs 1 KEV Critical Risk
+35d
35 days since previous release  ·  Contains 1 actively exploited vulnerability
⚠️ Contains 1 actively exploited vulnerability
Recommendation: Update immediately — contains known-exploited vulnerabilities (CISA KEV)
KB Article
KB5082200
Build
10.0.19044.7184
Vulnerabilities
109
CISA KEV
1
Days to Prev.
35
Supersedes
KB5078885
CVEs (109)
CVE-2026-03xx (1 CVE)
CVE-2026-23xx (2 CVEs)
CVE-2026-25xx (1 CVE)
February 2026 Security Update 2026-02-10 10.0.19044.6937
Out of Support Patch Tuesday 24 CVEs 5 KEV Critical Risk
+17d
17 days since previous release  ·  Contains 5 actively exploited vulnerabilities
⚠️ Contains 5 actively exploited vulnerabilities
Recommendation: Update immediately — contains known-exploited vulnerabilities (CISA KEV)
KB Article
KB5075912
Build
10.0.19044.6937
Vulnerabilities
24
CISA KEV
5
Days to Prev.
17
Supersedes
KB5073724
CVEs (24)
January 2026 Out-of-Band 2026-01-24 10.0.19044.6812
Out of Support Out of Band 0 CVEs
+7d
7 days since previous release  ·  Maintenance update with no published CVE entries
ℹ️ Maintenance update with no published CVE entries
Recommendation: Update recommended — may include unpublished security improvements
KB Article
KB5078129
Build
10.0.19044.6812
Vulnerabilities
0
Days to Prev.
7
January 2026 Out-of-Band 2026-01-17 10.0.19044.6811
Out of Support Out of Band 0 CVEs
+4d
4 days since previous release  ·  Maintenance update with no published CVE entries
ℹ️ Maintenance update with no published CVE entries
Recommendation: Update recommended — may include unpublished security improvements
KB Article
KB5077796
Build
10.0.19044.6811
Vulnerabilities
0
Days to Prev.
4
January 2026 Security Update 2026-01-13 10.0.19044.6809
Out of Support Patch Tuesday 72 CVEs 1 KEV Critical Risk
+26d
26 days since previous release  ·  Contains 1 actively exploited vulnerability
December 2025 Out-of-Band 2025-12-18 10.0.19044.6693
Out of Support Out of Band 0 CVEs
+9d
9 days since previous release  ·  Maintenance update with no published CVE entries
ℹ️ Maintenance update with no published CVE entries
Recommendation: Update recommended — may include unpublished security improvements
KB Article
KB5074976
Build
10.0.19044.6693
Vulnerabilities
0
Days to Prev.
9
December 2025 Security Update 2025-12-09 10.0.19044.6691
Out of Support Patch Tuesday 31 CVEs 1 KEV Critical Risk
+28d
28 days since previous release  ·  Contains 1 actively exploited vulnerability
⚠️ Contains 1 actively exploited vulnerability
Recommendation: Update immediately — contains known-exploited vulnerabilities (CISA KEV)
KB Article
KB5071546
Build
10.0.19044.6691
Vulnerabilities
31
CISA KEV
1
Days to Prev.
28
Supersedes
KB5068781
CVEs (31)
November 2025 Security Update 2025-11-11 10.0.19044.6575
Out of Support Patch Tuesday 36 CVEs 1 KEV Critical Risk
+28d
28 days since previous release  ·  Contains 1 actively exploited vulnerability
October 2025 Security Update 2025-10-14 10.0.19044.6456
Out of Support Patch Tuesday 98 CVEs 3 KEV Critical Risk
+35d
35 days since previous release  ·  Contains 3 actively exploited vulnerabilities
⚠️ Contains 3 actively exploited vulnerabilities
Recommendation: Update immediately — contains known-exploited vulnerabilities (CISA KEV)
KB Article
KB5066791
Build
10.0.19044.6456
Vulnerabilities
98
CISA KEV
3
Days to Prev.
35
Supersedes
KB5065429
CVEs (98)
CVE-2016-95xx (1 CVE)
CVE-2025-24xx (2 CVEs)
CVE-2025-25xx (1 CVE)
CVE-2025-47xx (1 CVE)
CVE-2025-48xx (1 CVE)
CVE-2025-49xx (1 CVE)
CVE-2025-50xx (2 CVEs)
CVE-2025-54xx (1 CVE)
August 2025 Out-of-Band 2025-08-19 10.0.19044.6218
Out of Support Out of Band 0 CVEs
+7d
7 days since previous release  ·  Maintenance update with no published CVE entries
ℹ️ Maintenance update with no published CVE entries
Recommendation: Update recommended — may include unpublished security improvements
KB Article
KB5066188
Build
10.0.19044.6218
Vulnerabilities
0
Days to Prev.
7
May 2025 Out-of-Band 2025-05-27 10.0.19044.5859
Out of Support Out of Band 0 CVEs
+8d
8 days since previous release  ·  Maintenance update with no published CVE entries
ℹ️ Maintenance update with no published CVE entries
Recommendation: Update recommended — may include unpublished security improvements
KB Article
KB5061979
Build
10.0.19044.5859
Vulnerabilities
0
Days to Prev.
8
May 2025 Out-of-Band 2025-05-19 10.0.19044.5856
Out of Support Out of Band 0 CVEs
+934d
934 days since previous release  ·  Maintenance update with no published CVE entries
ℹ️ Maintenance update with no published CVE entries
Recommendation: Update recommended — may include unpublished security improvements
KB Article
KB5061768
Build
10.0.19044.5856
Vulnerabilities
0
Days to Prev.
934
October 2022 Out-of-Band 2022-10-28 10.0.19044.2194
Out of Support Out of Band 0 CVEs
+11d
11 days since previous release  ·  Maintenance update with no published CVE entries
ℹ️ Maintenance update with no published CVE entries
Recommendation: Update recommended — may include unpublished security improvements
KB Article
KB5020953
Build
10.0.19044.2194
Vulnerabilities
0
Days to Prev.
11
October 2022 Out-of-Band 2022-10-17 10.0.19044.2132
Out of Support Out of Band 0 CVEs
+119d
119 days since previous release  ·  Maintenance update with no published CVE entries
ℹ️ Maintenance update with no published CVE entries
Recommendation: Update recommended — may include unpublished security improvements
KB Article
KB5020435
Build
10.0.19044.2132
Vulnerabilities
0
Days to Prev.
119
June 2022 Out-of-Band 2022-06-20 10.0.19044.1767
Out of Support Out of Band 0 CVEs
+32d
32 days since previous release  ·  Maintenance update with no published CVE entries
ℹ️ Maintenance update with no published CVE entries
Recommendation: Update recommended — may include unpublished security improvements
KB Article
KB5016139
Build
10.0.19044.1767
Vulnerabilities
0
Days to Prev.
32
May 2022 Out-of-Band 2022-05-19 10.0.19044.1708
Out of Support Out of Band 0 CVEs
+122d
122 days since previous release  ·  Maintenance update with no published CVE entries
ℹ️ Maintenance update with no published CVE entries
Recommendation: Update recommended — may include unpublished security improvements
KB Article
KB5015020
Build
10.0.19044.1708
Vulnerabilities
0
Days to Prev.
122
January 2022 Out-of-Band 2022-01-17 10.0.19044.1469
Out of Support Out of Band 0 CVEs
Maintenance update with no published CVE entries
ℹ️ Maintenance update with no published CVE entries
Recommendation: Update recommended — may include unpublished security improvements
KB Article
KB5010793
Build
10.0.19044.1469
Vulnerabilities
0

Additional Updates

16 releases Out-of-band and preview updates
Date Build KB Article Type
2023-03-21 19044.2788 KB5023773 2023-03 C
2023-02-21 19044.2673 KB5022906 2023-02 C
2023-01-19 19044.2546 KB5019275 2023-01 C
2022-11-15 19044.2311 KB5020030 2022-11 C
2022-10-25 19044.2193 KB5018482 2022-10 C
2022-09-20 19044.2075 KB5017380 2022-09 C
2022-08-26 19044.1949 KB5016688 2022-08 C
2022-07-26 19044.1865 KB5015878 2022-07 C
2022-06-28 19044.1806 KB5014666 2022-06 C
2022-06-02 19044.1741 KB5014023 2022-05 C
2022-04-25 19044.1682 KB5011831 2022-04 C
2022-03-22 19044.1620 KB5011543 2022-03 C
2022-02-15 19044.1566 KB5010415 2022-02 C
2022-01-25 19044.1503 KB5009596 2022-01 C
2021-11-22 19044.1387 KB5007253 2021-11 C
2021-11-16 19044.1288 2021-11 C