# Office Online Server security updates Patch Radar has 34 security fixes for Office Online Server, closing 201 CVEs. The newest security fix is KB5002928, released October 13, 2026. - Web page: https://patchblox.com/security/product/microsoft/office-online-server - Platform: Microsoft - Vendor: Microsoft - Supported: yes ## Security fixes, newest first | Fix | Released | Fixed in | Priority | CVEs | Exploited | |---|---|---|---|---:|---:| | [KB5002928](https://patchblox.com/security/data/fix/microsoft/kb5002928.md) | Oct 13, 2026 | | Urgent | 44 | 0 | | [KB5002910](https://patchblox.com/security/data/fix/microsoft/kb5002910.md) | Sep 8, 2026 | | High | 5 | 0 | | [KB5002884](https://patchblox.com/security/data/fix/microsoft/kb5002884.md) | Jul 14, 2026 | | Urgent | 56 | 0 | | [KB5002875](https://patchblox.com/security/data/fix/microsoft/kb5002875.md) | Jun 9, 2026 | | High | 7 | 0 | | [KB5002871](https://patchblox.com/security/data/fix/microsoft/kb5002871.md) | May 12, 2026 | | High | 3 | 0 | | [KB5002855](https://patchblox.com/security/data/fix/microsoft/kb5002855.md) | Apr 14, 2026 | | High | 5 | 0 | | [KB5002846](https://patchblox.com/security/data/fix/microsoft/kb5002846.md) | Mar 10, 2026 | | High | 4 | 0 | | [KB5002835](https://patchblox.com/security/data/fix/microsoft/kb5002835.md) | Feb 10, 2026 | | High | 3 | 0 | | [KB5002824](https://patchblox.com/security/data/fix/microsoft/kb5002824.md) | Jan 13, 2026 | | Urgent | 3 | 0 | | [KB5002817](https://patchblox.com/security/data/fix/microsoft/kb5002817.md) | Dec 9, 2025 | | High | 5 | 0 | | [KB5002801](https://patchblox.com/security/data/fix/microsoft/kb5002801.md) | Nov 11, 2025 | | High | 6 | 0 | | [KB5002752](https://patchblox.com/security/data/fix/microsoft/kb5002752.md) | Oct 16, 2025 | | High | 5 | 0 | | [KB5002797](https://patchblox.com/security/data/fix/microsoft/kb5002797.md) | Oct 14, 2025 | | Urgent | 8 | 0 | | [KB5002776](https://patchblox.com/security/data/fix/microsoft/kb5002776.md) | Sep 9, 2025 | | High | 6 | 0 | | [KB5002740](https://patchblox.com/security/data/fix/microsoft/kb5002740.md) | Jul 8, 2025 | | Urgent | 3 | 0 | | [KB5002728](https://patchblox.com/security/data/fix/microsoft/kb5002728.md) | Jun 10, 2025 | | High | 1 | 0 | | [KB5002707](https://patchblox.com/security/data/fix/microsoft/kb5002707.md) | May 13, 2025 | | High | 7 | 0 | | [KB5002699](https://patchblox.com/security/data/fix/microsoft/kb5002699.md) | Apr 8, 2025 | | High | 3 | 0 | | [KB5002690](https://patchblox.com/security/data/fix/microsoft/kb5002690.md) | Mar 11, 2025 | | High | 3 | 0 | | [KB5002679](https://patchblox.com/security/data/fix/microsoft/kb5002679.md) | Feb 11, 2025 | | Urgent | 5 | 0 | | [KB5002677](https://patchblox.com/security/data/fix/microsoft/kb5002677.md) | Jan 14, 2025 | | Urgent | 2 | 0 | | [KB5002503](https://patchblox.com/security/data/fix/microsoft/kb5002503.md) | May 14, 2024 | | High | 1 | 0 | | [KB5002097](https://patchblox.com/security/data/fix/microsoft/kb5002097.md) | Dec 14, 2021 | | High | 1 | 0 | | [KB5001943](https://patchblox.com/security/data/fix/microsoft/kb5001943.md) | Jun 8, 2021 | | High | 1 | 0 | | [KB4493192](https://patchblox.com/security/data/fix/microsoft/kb4493192.md) | Feb 9, 2021 | | High | 3 | 0 | | [KB4486750](https://patchblox.com/security/data/fix/microsoft/kb4486750.md) | Dec 15, 2020 | | High | 5 | 0 | | [KB4484470](https://patchblox.com/security/data/fix/microsoft/kb4484470.md) | Aug 11, 2020 | | High | 4 | 0 | | [KB4484254](https://patchblox.com/security/data/fix/microsoft/kb4484254.md) | Feb 11, 2020 | | High | 1 | 0 | | [KB4484223](https://patchblox.com/security/data/fix/microsoft/kb4484223.md) | Jan 14, 2020 | | High | 1 | 0 | | [KB4484141](https://patchblox.com/security/data/fix/microsoft/kb4484141.md) | Nov 12, 2019 | | High | 3 | 0 | | [KB4475595](https://patchblox.com/security/data/fix/microsoft/kb4475595.md) | Oct 8, 2019 | | High | 1 | 0 | | [KB4011027](https://patchblox.com/security/data/fix/microsoft/kb4011027.md) | Dec 11, 2018 | | Urgent | 2 | 0 | | [KB3213658](https://patchblox.com/security/data/fix/microsoft/kb3213658.md) | Sep 12, 2017 | | Urgent | 2 | 0 | | [KB3127895](https://patchblox.com/security/data/fix/microsoft/kb3127895.md) | Apr 11, 2017 | | High | 1 | 0 | --- Data as of 2026-11-08T06:59:42Z 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.