# Windows Server 2025 security updates Patch Radar has 42 security fixes for Windows Server 2025, closing 3,638 CVEs, 42 of which are being exploited. The newest security fix is KB5126646 (26100.33650), released October 13, 2026. - Web page: https://patchblox.com/security/product/microsoft/windows-server-2025 - Platform: Microsoft - Vendor: Microsoft - Supported: yes ## Security fixes, newest first | Fix | Released | Fixed in | Priority | CVEs | Exploited | |---|---|---|---|---:|---:| | [KB5126646](https://patchblox.com/security/data/fix/microsoft/kb5126646.md) | Oct 13, 2026 | 26100.33650 | Patch now | 1,041 | 1 | | [KB5122871](https://patchblox.com/security/data/fix/microsoft/kb5122871.md) | Sep 8, 2026 | 26100.33438 | Patch now | 687 | 1 | | [KB5120228](https://patchblox.com/security/data/fix/microsoft/kb5120228.md) | Aug 11, 2026 | 26100.33222 | Patch now | 204 | 1 | | [KB5120233](https://patchblox.com/security/data/fix/microsoft/kb5120233.md) | Aug 11, 2026 | 26100.33296 | Patch now | 204 | 1 | | [KB5099536](https://patchblox.com/security/data/fix/microsoft/kb5099536.md) | Jul 14, 2026 | 26100.33158 | Patch now | 383 | 2 | | [KB5094125](https://patchblox.com/security/data/fix/microsoft/kb5094125.md) | Jun 9, 2026 | 26100.32995 | Urgent | 103 | 0 | | [KB5094126](https://patchblox.com/security/data/fix/microsoft/kb5094126.md) | Jun 9, 2026 | | Urgent | 101 | 0 | | [KB5087423](https://patchblox.com/security/data/fix/microsoft/kb5087423.md) | May 12, 2026 | 26100.32772 | Urgent | 66 | 0 | | [KB5087539](https://patchblox.com/security/data/fix/microsoft/kb5087539.md) | May 12, 2026 | 26100.32860 | Urgent | 66 | 0 | | [KB5082063](https://patchblox.com/security/data/fix/microsoft/kb5082063.md) | Apr 14, 2026 | 26100.32690 | Patch now | 121 | 1 | | [KB5078736](https://patchblox.com/security/data/fix/microsoft/kb5078736.md) | Mar 10, 2026 | 26100.32463 | Urgent | 39 | 0 | | [KB5078740](https://patchblox.com/security/data/fix/microsoft/kb5078740.md) | Mar 10, 2026 | 26100.32522 | Urgent | 39 | 0 | | [KB5075899](https://patchblox.com/security/data/fix/microsoft/kb5075899.md) | Feb 10, 2026 | 26100.32370 | Patch now | 29 | 5 | | [KB5075942](https://patchblox.com/security/data/fix/microsoft/kb5075942.md) | Feb 10, 2026 | 26100.32313 | Patch now | 29 | 5 | | [KB5073379](https://patchblox.com/security/data/fix/microsoft/kb5073379.md) | Jan 13, 2026 | 26100.32230 | Patch now | 85 | 1 | | [KB5074204](https://patchblox.com/security/data/fix/microsoft/kb5074204.md) | Dec 18, 2025 | | High | 1 | 0 | | [KB5072033](https://patchblox.com/security/data/fix/microsoft/kb5072033.md) | Dec 9, 2025 | | Patch now | 34 | 2 | | [KB5072014](https://patchblox.com/security/data/fix/microsoft/kb5072014.md) | Dec 9, 2025 | | Patch now | 33 | 2 | | [KB5068861](https://patchblox.com/security/data/fix/microsoft/kb5068861.md) | Nov 11, 2025 | | Patch now | 35 | 1 | | [KB5068966](https://patchblox.com/security/data/fix/microsoft/kb5068966.md) | Nov 11, 2025 | | Patch now | 35 | 1 | | [KB5070893](https://patchblox.com/security/data/fix/microsoft/kb5070893.md) | Oct 23, 2025 | | Patch now | 1 | 1 | | [KB5070881](https://patchblox.com/security/data/fix/microsoft/kb5070881.md) | Oct 23, 2025 | 26100.6905 | Patch now | 1 | 1 | | [KB5066835](https://patchblox.com/security/data/fix/microsoft/kb5066835.md) | Oct 14, 2025 | | Patch now | 134 | 3 | | [KB5065426](https://patchblox.com/security/data/fix/microsoft/kb5065426.md) | Sep 9, 2025 | 26100.6584 | Urgent | 63 | 0 | | [KB5065474](https://patchblox.com/security/data/fix/microsoft/kb5065474.md) | Sep 9, 2025 | 26100.6508 | Urgent | 63 | 0 | | [KB5063878](https://patchblox.com/security/data/fix/microsoft/kb5063878.md) | Aug 12, 2025 | 26100.4946 | Urgent | 61 | 0 | | [KB5064010](https://patchblox.com/security/data/fix/microsoft/kb5064010.md) | Aug 12, 2025 | 26100.4851 | Urgent | 61 | 0 | | [KB5062553](https://patchblox.com/security/data/fix/microsoft/kb5062553.md) | Jul 8, 2025 | 26100.4652 | Urgent | 102 | 0 | | [KB5060842](https://patchblox.com/security/data/fix/microsoft/kb5060842.md) | Jun 10, 2025 | 26100.4349 | Patch now | 40 | 2 | | [KB5060841](https://patchblox.com/security/data/fix/microsoft/kb5060841.md) | Jun 10, 2025 | 26100.4270 | Patch now | 39 | 2 | | [KB5058411](https://patchblox.com/security/data/fix/microsoft/kb5058411.md) | May 13, 2025 | 26100.4061 | Patch now | 43 | 5 | | [KB5058497](https://patchblox.com/security/data/fix/microsoft/kb5058497.md) | May 13, 2025 | 26100.3981 | Patch now | 41 | 5 | | [KB5055523](https://patchblox.com/security/data/fix/microsoft/kb5055523.md) | Apr 8, 2025 | 26100.3775 | Patch now | 84 | 1 | | [KB5053598](https://patchblox.com/security/data/fix/microsoft/kb5053598.md) | Mar 11, 2025 | 26100.3476 | Patch now | 37 | 6 | | [KB5053636](https://patchblox.com/security/data/fix/microsoft/kb5053636.md) | Mar 11, 2025 | 26100.3403 | Patch now | 36 | 6 | | [KB5051987](https://patchblox.com/security/data/fix/microsoft/kb5051987.md) | Feb 11, 2025 | 26100.3194 | Patch now | 39 | 3 | | [KB5052105](https://patchblox.com/security/data/fix/microsoft/kb5052105.md) | Feb 11, 2025 | 26100.3107 | Patch now | 37 | 2 | | [KB5050009](https://patchblox.com/security/data/fix/microsoft/kb5050009.md) | Jan 14, 2025 | 26100.2894 | Patch now | 130 | 3 | | [KB5048794](https://patchblox.com/security/data/fix/microsoft/kb5048794.md) | Dec 10, 2024 | 26100.2528 | Patch now | 59 | 1 | | [KB5048667](https://patchblox.com/security/data/fix/microsoft/kb5048667.md) | Dec 10, 2024 | 26100.2605 | Patch now | 58 | 1 | | [KB5046696](https://patchblox.com/security/data/fix/microsoft/kb5046696.md) | Nov 12, 2024 | 26100.2240 | Patch now | 36 | 2 | | [KB5046617](https://patchblox.com/security/data/fix/microsoft/kb5046617.md) | Nov 12, 2024 | 26100.2314 | Patch now | 33 | 2 | --- Data as of 2026-11-07T18:46:35Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.