Windows 10 21H2

End of Life

Latest Release

KB Article KB5087544
Build 10.0.19044.7291
Released 2026-05-12
Age 8 days ago
CVEs Fixed 56
Exploited 0
Release Type Patch Tuesday
End of Support (Home/Pro) 2023-06-13
End of Support (Ent/Edu) 2024-06-11
Security Information
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Recommendation: Update recommended — may include unpublished security improvements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Recommendation: Update recommended — may include unpublished security improvements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Recommendation: Update recommended — may include unpublished security improvements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
July 2025 Security Update 2025-07-08 10.0.19044.6093
Out of Support Patch Tuesday 74 CVEs
+28d
28 days since previous release  ·  Addresses 74 security issues
June 2025 Security Update 2025-06-10 10.0.19044.5965
Out of Support Patch Tuesday 35 CVEs 2 KEV Critical Risk
+14d
14 days since previous release  ·  Contains 2 actively exploited vulnerabilities
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
+6d
6 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.
6
May 2025 Security Update 2025-05-13 10.0.19044.5854
Out of Support Patch Tuesday 34 CVEs 5 KEV Critical Risk
+928d
928 days since previous release  ·  Contains 5 actively exploited vulnerabilities
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