# Windows 8.1 for 32-bit systems security updates Patch Radar has 198 security fixes for Windows 8.1 for 32-bit systems, closing 1,927 CVEs, 82 of which are being exploited. The newest security fix is KB3187754, released November 18, 2024. This product is no longer supported. - Web page: https://patchblox.com/security/product/microsoft/windows-8.1-for-32-bit-systems - Platform: Microsoft - Vendor: Microsoft - Supported: no ## Security fixes, newest first | Fix | Released | Fixed in | Priority | CVEs | Exploited | |---|---|---|---|---:|---:| | [KB3187754](https://patchblox.com/security/data/fix/microsoft/kb3187754.md) | Nov 18, 2024 | | Urgent | 1 | 0 | | [KB5022346](https://patchblox.com/security/data/fix/microsoft/kb5022346.md) | Jan 10, 2023 | | Patch now | 49 | 1 | | [KB5022352](https://patchblox.com/security/data/fix/microsoft/kb5022352.md) | Jan 10, 2023 | | Patch now | 49 | 1 | | [KB5021294](https://patchblox.com/security/data/fix/microsoft/kb5021294.md) | Dec 13, 2022 | | Urgent | 20 | 0 | | [KB5021296](https://patchblox.com/security/data/fix/microsoft/kb5021296.md) | Dec 13, 2022 | | Urgent | 20 | 0 | | [KB5020010](https://patchblox.com/security/data/fix/microsoft/kb5020010.md) | Nov 8, 2022 | | Patch now | 24 | 3 | | [KB5020023](https://patchblox.com/security/data/fix/microsoft/kb5020023.md) | Nov 8, 2022 | | Patch now | 24 | 3 | | [KB5019958](https://patchblox.com/security/data/fix/microsoft/kb5019958.md) | Nov 8, 2022 | | Patch now | 3 | 2 | | [KB5018474](https://patchblox.com/security/data/fix/microsoft/kb5018474.md) | Oct 11, 2022 | | Patch now | 49 | 2 | | [KB5018476](https://patchblox.com/security/data/fix/microsoft/kb5018476.md) | Oct 11, 2022 | | Patch now | 49 | 2 | | [KB5017365](https://patchblox.com/security/data/fix/microsoft/kb5017365.md) | Sep 13, 2022 | | Patch now | 38 | 1 | | [KB5017367](https://patchblox.com/security/data/fix/microsoft/kb5017367.md) | Sep 13, 2022 | | Patch now | 38 | 1 | | [KB5016681](https://patchblox.com/security/data/fix/microsoft/kb5016681.md) | Aug 9, 2022 | | Patch now | 38 | 1 | | [KB5016683](https://patchblox.com/security/data/fix/microsoft/kb5016683.md) | Aug 9, 2022 | | Patch now | 38 | 1 | | [KB5012170](https://patchblox.com/security/data/fix/microsoft/kb5012170.md) | Aug 9, 2022 | | Urgent | 4 | 0 | | [KB5015874](https://patchblox.com/security/data/fix/microsoft/kb5015874.md) | Jul 12, 2022 | | Patch now | 37 | 1 | | [KB5015877](https://patchblox.com/security/data/fix/microsoft/kb5015877.md) | Jul 12, 2022 | | Patch now | 37 | 1 | | [KB5014738](https://patchblox.com/security/data/fix/microsoft/kb5014738.md) | Jun 14, 2022 | | Patch now | 26 | 1 | | [KB5014746](https://patchblox.com/security/data/fix/microsoft/kb5014746.md) | Jun 14, 2022 | | Patch now | 26 | 1 | | [KB5014001](https://patchblox.com/security/data/fix/microsoft/kb5014001.md) | May 10, 2022 | | Patch now | 45 | 2 | | [KB5014011](https://patchblox.com/security/data/fix/microsoft/kb5014011.md) | May 10, 2022 | | Patch now | 45 | 2 | | [KB5012639](https://patchblox.com/security/data/fix/microsoft/kb5012639.md) | Apr 12, 2022 | | Patch now | 65 | 2 | | [KB5012670](https://patchblox.com/security/data/fix/microsoft/kb5012670.md) | Apr 12, 2022 | | Patch now | 65 | 2 | | [KB5011560](https://patchblox.com/security/data/fix/microsoft/kb5011560.md) | Mar 8, 2022 | | Urgent | 23 | 0 | | [KB5011564](https://patchblox.com/security/data/fix/microsoft/kb5011564.md) | Mar 8, 2022 | | Urgent | 23 | 0 | | [KB5011486](https://patchblox.com/security/data/fix/microsoft/kb5011486.md) | Mar 8, 2022 | | Urgent | 1 | 0 | | [KB5010395](https://patchblox.com/security/data/fix/microsoft/kb5010395.md) | Feb 8, 2022 | | Patch now | 14 | 2 | | [KB5010419](https://patchblox.com/security/data/fix/microsoft/kb5010419.md) | Feb 8, 2022 | | Patch now | 14 | 2 | | [KB5009595](https://patchblox.com/security/data/fix/microsoft/kb5009595.md) | Jan 11, 2022 | | Patch now | 51 | 1 | | [KB5009624](https://patchblox.com/security/data/fix/microsoft/kb5009624.md) | Jan 11, 2022 | | Patch now | 51 | 1 | | [KB5008263](https://patchblox.com/security/data/fix/microsoft/kb5008263.md) | Dec 14, 2021 | | Patch now | 20 | 1 | | [KB5008285](https://patchblox.com/security/data/fix/microsoft/kb5008285.md) | Dec 14, 2021 | | Patch now | 20 | 1 | | [KB5007247](https://patchblox.com/security/data/fix/microsoft/kb5007247.md) | Nov 9, 2021 | | Patch now | 17 | 3 | | [KB5007255](https://patchblox.com/security/data/fix/microsoft/kb5007255.md) | Nov 9, 2021 | | Patch now | 17 | 3 | | [KB5006714](https://patchblox.com/security/data/fix/microsoft/kb5006714.md) | Oct 12, 2021 | | Patch now | 28 | 1 | | [KB5006729](https://patchblox.com/security/data/fix/microsoft/kb5006729.md) | Oct 12, 2021 | | Patch now | 27 | 1 | | [KB5006671](https://patchblox.com/security/data/fix/microsoft/kb5006671.md) | Oct 12, 2021 | | Routine | 1 | 0 | | [KB5005613](https://patchblox.com/security/data/fix/microsoft/kb5005613.md) | Sep 14, 2021 | | Patch now | 26 | 2 | | [KB5005627](https://patchblox.com/security/data/fix/microsoft/kb5005627.md) | Sep 14, 2021 | | Patch now | 26 | 2 | | [KB5005076](https://patchblox.com/security/data/fix/microsoft/kb5005076.md) | Aug 10, 2021 | | Patch now | 19 | 2 | | [KB5005106](https://patchblox.com/security/data/fix/microsoft/kb5005106.md) | Aug 10, 2021 | | Patch now | 18 | 2 | | [KB5005036](https://patchblox.com/security/data/fix/microsoft/kb5005036.md) | Aug 10, 2021 | | Urgent | 1 | 0 | | [KB5004298](https://patchblox.com/security/data/fix/microsoft/kb5004298.md) | Jul 13, 2021 | | Patch now | 49 | 3 | | [KB5005563](https://patchblox.com/security/data/fix/microsoft/kb5005563.md) | Jul 13, 2021 | | Patch now | 5 | 2 | | [KB5004285](https://patchblox.com/security/data/fix/microsoft/kb5004285.md) | Jul 13, 2021 | | Patch now | 45 | 2 | | [KB5003671](https://patchblox.com/security/data/fix/microsoft/kb5003671.md) | Jun 8, 2021 | | Patch now | 18 | 5 | | [KB5003681](https://patchblox.com/security/data/fix/microsoft/kb5003681.md) | Jun 8, 2021 | | Patch now | 15 | 4 | | [KB5003636](https://patchblox.com/security/data/fix/microsoft/kb5003636.md) | Jun 8, 2021 | | Patch now | 3 | 1 | | [KB5003209](https://patchblox.com/security/data/fix/microsoft/kb5003209.md) | May 11, 2021 | | Urgent | 13 | 0 | | [KB5003220](https://patchblox.com/security/data/fix/microsoft/kb5003220.md) | May 11, 2021 | | Urgent | 12 | 0 | | [KB5001382](https://patchblox.com/security/data/fix/microsoft/kb5001382.md) | Apr 13, 2021 | | Urgent | 55 | 0 | | [KB5001393](https://patchblox.com/security/data/fix/microsoft/kb5001393.md) | Apr 13, 2021 | | Urgent | 55 | 0 | | [KB5000848](https://patchblox.com/security/data/fix/microsoft/kb5000848.md) | Mar 9, 2021 | | Patch now | 28 | 1 | | [KB5000853](https://patchblox.com/security/data/fix/microsoft/kb5000853.md) | Mar 9, 2021 | | Urgent | 27 | 0 | | [KB4601349](https://patchblox.com/security/data/fix/microsoft/kb4601349.md) | Feb 9, 2021 | | Patch now | 17 | 1 | | [KB4601384](https://patchblox.com/security/data/fix/microsoft/kb4601384.md) | Feb 9, 2021 | | Patch now | 17 | 1 | | [KB4598275](https://patchblox.com/security/data/fix/microsoft/kb4598275.md) | Jan 12, 2021 | | Urgent | 42 | 0 | | [KB4598285](https://patchblox.com/security/data/fix/microsoft/kb4598285.md) | Jan 12, 2021 | | Urgent | 42 | 0 | | [KB4592484](https://patchblox.com/security/data/fix/microsoft/kb4592484.md) | Dec 8, 2020 | | Urgent | 5 | 0 | | [KB4592495](https://patchblox.com/security/data/fix/microsoft/kb4592495.md) | Dec 8, 2020 | | Urgent | 5 | 0 | | [KB4586845](https://patchblox.com/security/data/fix/microsoft/kb4586845.md) | Nov 10, 2020 | | Patch now | 34 | 1 | | [KB4586823](https://patchblox.com/security/data/fix/microsoft/kb4586823.md) | Nov 10, 2020 | | Patch now | 33 | 1 | | [KB4580347](https://patchblox.com/security/data/fix/microsoft/kb4580347.md) | Oct 13, 2020 | | Urgent | 20 | 0 | | [KB4580358](https://patchblox.com/security/data/fix/microsoft/kb4580358.md) | Oct 13, 2020 | | Urgent | 20 | 0 | | [KB4577066](https://patchblox.com/security/data/fix/microsoft/kb4577066.md) | Sep 8, 2020 | | Patch now | 49 | 1 | | [KB4577071](https://patchblox.com/security/data/fix/microsoft/kb4577071.md) | Sep 8, 2020 | | Urgent | 47 | 0 | | [KB4571703](https://patchblox.com/security/data/fix/microsoft/kb4571703.md) | Aug 11, 2020 | | Patch now | 58 | 2 | | [KB4571723](https://patchblox.com/security/data/fix/microsoft/kb4571723.md) | Aug 11, 2020 | | Patch now | 55 | 1 | | [KB4578013](https://patchblox.com/security/data/fix/microsoft/kb4578013.md) | Aug 11, 2020 | | High | 2 | 0 | | [KB4565541](https://patchblox.com/security/data/fix/microsoft/kb4565541.md) | Jul 14, 2020 | | Patch now | 43 | 1 | | [KB4565540](https://patchblox.com/security/data/fix/microsoft/kb4565540.md) | Jul 14, 2020 | | Patch now | 41 | 1 | | [KB4566425](https://patchblox.com/security/data/fix/microsoft/kb4566425.md) | Jul 14, 2020 | | High | 1 | 0 | | [KB4561666](https://patchblox.com/security/data/fix/microsoft/kb4561666.md) | Jun 9, 2020 | | Patch now | 46 | 1 | | [KB4561673](https://patchblox.com/security/data/fix/microsoft/kb4561673.md) | Jun 9, 2020 | | Patch now | 37 | 1 | | [KB4556846](https://patchblox.com/security/data/fix/microsoft/kb4556846.md) | May 12, 2020 | | Patch now | 37 | 1 | | [KB4556853](https://patchblox.com/security/data/fix/microsoft/kb4556853.md) | May 12, 2020 | | Patch now | 30 | 1 | | [KB4550961](https://patchblox.com/security/data/fix/microsoft/kb4550961.md) | Apr 14, 2020 | | Patch now | 43 | 4 | | [KB4550970](https://patchblox.com/security/data/fix/microsoft/kb4550970.md) | Apr 14, 2020 | | Patch now | 39 | 3 | | [KB4541509](https://patchblox.com/security/data/fix/microsoft/kb4541509.md) | Mar 10, 2020 | | Patch now | 60 | 1 | | [KB4541505](https://patchblox.com/security/data/fix/microsoft/kb4541505.md) | Mar 10, 2020 | | Patch now | 54 | 1 | | [KB4537821](https://patchblox.com/security/data/fix/microsoft/kb4537821.md) | Feb 11, 2020 | | Patch now | 54 | 2 | | [KB4537803](https://patchblox.com/security/data/fix/microsoft/kb4537803.md) | Feb 11, 2020 | | Patch now | 51 | 1 | | [KB4534297](https://patchblox.com/security/data/fix/microsoft/kb4534297.md) | Jan 14, 2020 | | Urgent | 27 | 0 | | [KB4534309](https://patchblox.com/security/data/fix/microsoft/kb4534309.md) | Jan 14, 2020 | | Urgent | 26 | 0 | | [KB4530702](https://patchblox.com/security/data/fix/microsoft/kb4530702.md) | Dec 10, 2019 | | Patch now | 11 | 1 | | [KB4530730](https://patchblox.com/security/data/fix/microsoft/kb4530730.md) | Dec 10, 2019 | | Patch now | 10 | 1 | | [KB4525243](https://patchblox.com/security/data/fix/microsoft/kb4525243.md) | Nov 12, 2019 | | Patch now | 39 | 3 | | [KB4525250](https://patchblox.com/security/data/fix/microsoft/kb4525250.md) | Nov 12, 2019 | | Patch now | 37 | 2 | | [KB4520005](https://patchblox.com/security/data/fix/microsoft/kb4520005.md) | Oct 8, 2019 | | Patch now | 27 | 2 | | [KB4519990](https://patchblox.com/security/data/fix/microsoft/kb4519990.md) | Oct 8, 2019 | | Patch now | 21 | 1 | | [KB4516067](https://patchblox.com/security/data/fix/microsoft/kb4516067.md) | Sep 10, 2019 | | Patch now | 37 | 2 | | [KB4516064](https://patchblox.com/security/data/fix/microsoft/kb4516064.md) | Sep 10, 2019 | | Patch now | 33 | 2 | | [KB4512488](https://patchblox.com/security/data/fix/microsoft/kb4512488.md) | Aug 13, 2019 | | Urgent | 41 | 0 | | [KB4512489](https://patchblox.com/security/data/fix/microsoft/kb4512489.md) | Aug 13, 2019 | | Urgent | 38 | 0 | | [KB4507448](https://patchblox.com/security/data/fix/microsoft/kb4507448.md) | Jul 9, 2019 | | Patch now | 30 | 2 | | [KB4507457](https://patchblox.com/security/data/fix/microsoft/kb4507457.md) | Jul 9, 2019 | | Patch now | 24 | 2 | | [KB4503276](https://patchblox.com/security/data/fix/microsoft/kb4503276.md) | Jun 11, 2019 | | Urgent | 41 | 0 | | [KB4503290](https://patchblox.com/security/data/fix/microsoft/kb4503290.md) | Jun 11, 2019 | | Urgent | 34 | 0 | | [KB4499151](https://patchblox.com/security/data/fix/microsoft/kb4499151.md) | May 14, 2019 | | Patch now | 30 | 2 | | [KB4499165](https://patchblox.com/security/data/fix/microsoft/kb4499165.md) | May 14, 2019 | | Patch now | 24 | 2 | Showing the newest 100 of 198 fixes. --- Data as of 2026-11-11T19:49:26Z 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.