Microsoft · Microsoft
Windows 11 version 21H2 for x64-based Systems security updates
Patch Radar has 41 security fixes for Windows 11 version 21H2 for x64-based Systems, closing 1,593 CVEs, 69 of which are being exploited. The newest security fix is KB5055518, released April 8, 2025. This product is no longer supported.
Unsupported product69 exploited CVEs
Latest version
n/a
Release date not known
Security fixes
41
On record in Patch Radar
CVEs
1,593
Closed by those fixes
Exploited
69
Vendor report or CISA KEV
Security fixes, newest first
| Priority | Fix | Fixed in | CVEs | Exploited | Released |
|---|---|---|---|---|---|
| Patch now | KB5055518 | 61 | 1 | Apr 8, 2025 | |
| Routine | KB5046398 | 1 | Oct 8, 2024 | ||
| Patch now | KB5044280 | 22000.3260 | 63 | 2 | Oct 8, 2024 |
| Patch now | KB5043067 | 22000.3197 | 30 | 3 | Sep 10, 2024 |
| Urgent | KB5042321 | 1 | Aug 13, 2024 | ||
| Patch now | KB5041592 | 22000.3147 | 43 | 4 | Aug 13, 2024 |
| Patch now | KB5040431 | 22000.3079 | 79 | 3 | Jul 9, 2024 |
| Patch now | KB5039213 | 22000.3019 | 28 | 3 | Jun 11, 2024 |
| Patch now | KB5037770 | 22000.2960 | 41 | 2 | May 14, 2024 |
| Patch now | KB5036894 | 22000.2899 | 67 | 2 | Apr 9, 2024 |
| Patch now | KB5035854 | 22000.2836 | 35 | 1 | Mar 12, 2024 |
| Patch now | KB5034766 | 22000.2777 | 40 | 3 | Feb 13, 2024 |
| Urgent | KB5034121 | 22000.2713 | 34 | Jan 9, 2024 | |
| Urgent | KB5033369 | 22000.2652 | 16 | Dec 12, 2023 | |
| Patch now | KB5032192 | 22000.2600 | 32 | 4 | Nov 14, 2023 |
| Patch now | KB5031358 | 22000.2538 | 75 | 3 | Oct 10, 2023 |
| Patch now | KB5030217 | 22000.2416 | 18 | 1 | Sep 12, 2023 |
| Patch now | KB5029253 | 22000.2295 | 34 | 1 | Aug 8, 2023 |
| Patch now | KB5028182 | 22000.2176 | 83 | 3 | Jul 11, 2023 |
| Patch now | KB5027223 | 22000.2057 | 29 | 1 | Jun 13, 2023 |
| Urgent | KB5026368 | 22000.1936 | 21 | May 9, 2023 | |
| Patch now | KB5025224 | 22000.1817 | 59 | 3 | Apr 11, 2023 |
| Patch now | KB5023698 | 22000.1696 | 54 | 1 | Mar 14, 2023 |
| Patch now | KB5022836 | 22000.1574 | 33 | 2 | Feb 14, 2023 |
| Patch now | KB5022287 | 22000.1455 | 66 | 1 | Jan 10, 2023 |
| Patch now | KB5021234 | 22000.1335 | 25 | 1 | Dec 13, 2022 |
| Patch now | KB5019961 | 22000.1219 | 37 | 5 | Nov 8, 2022 |
| Patch now | KB5018418 | 22000.1098 | 65 | 2 | Oct 11, 2022 |
| Patch now | KB5017328 | 22000.978 | 40 | 1 | Sep 13, 2022 |
| Urgent | KB5012170 | 4 | Aug 9, 2022 | ||
| Patch now | KB5016629 | 22000.856 | 57 | 1 | Aug 9, 2022 |
| Patch now | KB5015814 | 22000.795 | 40 | 1 | Jul 12, 2022 |
| Patch now | KB5014697 | 22000.739 | 28 | 1 | Jun 14, 2022 |
| Patch now | KB5013943 | 22000.675 | 45 | 1 | May 10, 2022 |
| Patch now | KB5012592 | 22000.613 | 68 | 2 | Apr 12, 2022 |
| Urgent | KB5011493 | 22000.556 | 28 | Mar 8, 2022 | |
| Patch now | KB5010386 | 22000.493 | 22 | 3 | Feb 8, 2022 |
| Patch now | KB5009566 | 22000.434 | 65 | 2 | Jan 11, 2022 |
| Patch now | KB5008215 | 22000.376 | 31 | 1 | Dec 14, 2021 |
| Patch now | KB5007215 | 22000.318 | 23 | 2 | Nov 9, 2021 |
| Patch now | KB5006674 | 22000.258 | 41 | 3 | Oct 12, 2021 |
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