Ends in 3 months
Windows 10 2021 (21H2) LTSC
Support ends on 12 Jan 2027 (in 3 months). The newest release is 19044.7807, published 13 Oct 2026.
What to do
Plan the move now: after 12 Jan 2027 Windows 10 2021 (21H2) LTSC gets no more updates, including security fixes. Until then, stay on 19044.7807.
Move to Windows 10 2019 (1809) LTSCLatest 17763.9376 · supported until 9 Jan 202923 more months of support- Microsoft lifecycle: Windows 10 Enterprise LTSC 2021 · End of support 12 Jan 2027
- Microsoft lifecycle: Windows Azure Pack (on Windows Server 2016) · End of support 12 Jan 2027
- Microsoft lifecycle: Windows Defender for Windows Server 2016 · End of support 12 Jan 2027
- Microsoft lifecycle: Windows Storage Server 2016 · End of support 12 Jan 2027
19044.7807Newest release · 1d ago
90
Days of support left · until 12 Jan 2027
16Releases in the last 12 months · typically every 28 days
1631CVEs fixed in collected releases · 3 exploitedIs your version current?
Compared with the publisher's releases of this lineWindows support timeline
From first preview through release to end of support, as the vendors publish them- Windows 11 23H2 Enterprise and Education ends on 10 Nov 2026 (in 27 days).
- Windows 10 2021 (21H2) LTSC ends on 12 Jan 2027 (in 3 months).
- Windows 11 25H2 Home and Pro and Windows 11 24H2 Enterprise and Education end on 12 Oct 2027 (in 12 months).
- The newest supported line is Windows 11 24H2 LTSC, supported until 10 Oct 2034.
Windows 11 26H2 Enterprise and Education26300.9711 · until 9 Oct 2029 (in 36 months)
Windows 11 26H2 Home and Pro26300.9711 · until 10 Oct 2028 (in 24 months)
Windows 11 26H1 Enterprise and Education28000.3231 · until 13 Mar 2029 (in 29 months)
Windows 11 26H1 Home and Pro28000.3231 · until 14 Mar 2028 (in 17 months)
Windows 11 25H2 Enterprise and Education26200.9711 · until 10 Oct 2028 (in 24 months)
Windows 11 25H2 Home and Pro26200.9711 · until 12 Oct 2027 (in 12 months)
Windows 11 24H2 Enterprise and Education26100.9711 · until 12 Oct 2027 (in 12 months)
Windows 11 23H2 Enterprise and Education22631.7652 · until 10 Nov 2026 (in 27 days)
Windows 10 2021 (21H2) LTSCLTS19044.7807 · until 12 Jan 2027 (in 3 months)
Ticks are releases; the red ones fix CVEs. Dates come from each vendor's release and lifecycle data and move when the vendor changes them.
Releases of Windows 10 2021 (21H2) LTSC
24 collected for Windows 10, version 21H2, newest first| Version | Published | Release | Security |
|---|---|---|---|
| 19044.7807 | 13 Oct 2026 | 2026-10 BKB5126657 | 898 CVEs fixed1 exploited |
| 19044.7727 | 14 Sep 2026 | 2026-09 OOBKB5129236 | — |
| 19044.7725 | 8 Sep 2026 | 2026-09 BKB5122878 | 575 CVEs fixed1 exploited |
| 19044.7663 | 11 Aug 2026 | 2026-08 BKB5120249 | 157 CVEs fixed1 exploited |
| 19044.7548 | 14 Jul 2026 | 2026-07 BKB5099539 | 1 CVE fixed |
| 19044.7417 | 9 Jun 2026 | 2026-06 BKB5094127 | — |
| 19044.7291 | 12 May 2026 | 2026-05 BKB5087544 | — |
| 19044.7184 | 14 Apr 2026 | 2026-04 BKB5082200 | — |
| 19044.7058 | 10 Mar 2026 | 2026-03 BKB5078885 | — |
| 19044.6937 | 10 Feb 2026 | 2026-02 BKB5075912 | — |
| 19044.6812 | 24 Jan 2026 | 2026-01 OOBKB5078129 | — |
| 19044.6811 | 17 Jan 2026 | 2026-01 OOBKB5077796 | — |
| 19044.6809 | 13 Jan 2026 | 2026-01 BKB5073724 | — |
| 19044.6693 | 18 Dec 2025 | 2025-12 OOBKB5074976 | — |
| 19044.6691 | 9 Dec 2025 | 2025-12 BKB5071546 | — |
Security fixes
CVEs the collected releases fix, newest first| CVE | Severity | Fixed in |
|---|---|---|
| CVE-2026-96951Windows Shell Security Feature Bypass Vulnerability | ExploitedImportant · CVSS 8.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-100202Windows Message Queuing Queue Manager Remote Code Execution Vulnerability | Critical · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-100222Network Policy Server (NPS) Remote Code Execution Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-102210Windows Text Shaping Remote Code Execution Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-105010Microsoft Windows Search Component Elevation of Privilege Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-69634Windows iSCSI Remote Code Execution Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-69639Windows libarchive Remote Code Execution Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-69705Windows iSCSI Remote Code Execution Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-69883Windows iSCSI Remote Code Execution Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-69886Windows Imaging Component Remote Code Execution Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-70024Windows Internet Information Services Remote Code Execution Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-70096Windows Rich Text Edit Control Remote Code Execution Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-70147Microsoft PostScript Printer Driver Remote Code Execution Vulnerability | Critical · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-70153Microsoft PostScript Printer Driver Remote Code Execution Vulnerability | Critical · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-70157Windows System Information Console Remote Code Execution Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-83517Microsoft Windows Media Foundation Remote Code Execution Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-83519Windows Error Reporting Remote Code Execution Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-83578Microsoft PowerShell Remote Code Execution Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-83693Windows Error Reporting Remote Code Execution Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-83748Windows Error Reporting Remote Code Execution Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-83770Windows Text Shaping Remote Code Execution Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-83782Windows Shell Remote Code Execution Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-83869Windows Domain Name Service Remote Code Execution Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-83910RPC Runtime Library Remote Code Execution Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
| CVE-2026-83935Microsoft XML Remote Code Execution Vulnerability | Important · CVSS 9.8 | 19044.7807 · 13 Oct 2026 |
1606 more CVEs are named in older releases' notes.
What changed
First observed 14 Oct 2026No field changes in the recorded history.
Cite this recorded revision to keep the same title, summary, facts and links when the page changes.
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Keep track
- Add the end of support to your calendar: one event on 12 Jan 2027, with a reminder 30 days before.
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