Patch tracker / KB5002758
KB5002758: Office Online Server Security Update (August 2025)
KB5002758 is a High security update for Office Online Server, released 2025-08-12. It closes 4 CVEs with a maximum CVSS of 7.8. Get it from the Microsoft Update Catalog below, and see where it sits against the rest of the month on the patch tracker.
Update summary
New to these terms? How the Microsoft patching tools fit together, this month's Patch Tuesday summary, and every update ranked by real-world risk.
Senserva AI Opinion for KB5002758
KB5002758 is an August 12, 2025 Office update that patches four CVEs across Office 2019 (32-bit and 64-bit) and Office Online Server, with the most serious rated High at CVSS 7.8. Anyone running these Office builds is exposed, and the inclusion of Office Online Server means server-side rendering deployments need attention beyond just desktop clients. None of the four CVEs are in the CISA KEV catalog and EPSS peaks at only 1 percent, so this is a maintenance-window fix rather than an emergency.
Do this: Schedule KB5002758 across your Office 2019 clients and any Office Online Server hosts in this month's patch cycle.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5002758
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5002758
Senserva began recording day-to-day change history on 2026-07-07, and refreshes it several times a day. Release dates are historical where Microsoft publishes them; revision history is tracked from that date forward, so it does not include changes made before then.
Exploitation and severity
Fixes 4 CVEs. Most severe CVSS 7.8 (High). EPSS exploit probability up to <1%.
Among the lower half of tracked Microsoft updates by EPSS exploit probability.
What to do
Moderate priority: schedule it in your normal patch cycle. Senserva flags whether KB5002758 is missing on your devices.
Check if KB5002758 is installed
Copy-paste PowerShell: one machine, or your whole estate in one pass. No output means the update is not installed.
Get-HotFix covers Windows updates. Office, SharePoint, and Exchange server updates show under installed updates in Programs and Features, or check the Update Catalog history.
CVEs fixed by this update
Sorted exploited-first, then by CVSS. Every CVE links to its Senserva page with the full risk facts, references, and a ready-to-paste AI prompt.
| CVE | Severity | CVSS | EPSS | Exploited |
|---|---|---|---|---|
| CVE-2025-53735 | High | 7.8 | <1% | No |
| CVE-2025-53737 | High | 7.8 | <1% | No |
| CVE-2025-53739 | High | 7.8 | <1% | No |
| CVE-2025-53741 | High | 7.8 | <1% | No |
Affected products
Also released in August 2025
The highest-risk updates from the same release:
The full month, summarized: Microsoft Patch Tuesday.
Authoritative references
See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.