Patch tracker / KB5002782
KB5002782: Office Online Server Security Update (September 2025)
KB5002782 is a High security update for Office Online Server, released 2025-09-09. It closes 7 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 KB5002782
KB5002782 patches 7 vulnerabilities across Office Online Server and Office 2019 in both 32-bit and 64-bit editions, with the worst rated High severity at CVSS 7.8. None are in the CISA KEV catalog and EPSS tops out at 1%, so active exploitation is not currently indicated, but the mix of client Office 2019 and the server-side Office Online Server component means both desktop fleets and document-rendering servers need this.
Do this: Deploy KB5002782 to Office 2019 clients and any Office Online Server instances, starting with the server component since it processes documents from multiple users.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5002782
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5002782
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 7 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 KB5002782 is missing on your devices.
Check if KB5002782 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-2025-54896 | High | 7.8 | <1% | No |
| CVE-2025-54898 | High | 7.8 | <1% | No |
| CVE-2025-54899 | High | 7.8 | <1% | No |
| CVE-2025-54900 | High | 7.8 | <1% | No |
| CVE-2025-54902 | High | 7.8 | <1% | No |
| CVE-2025-54903 | High | 7.8 | <1% | No |
| CVE-2025-54904 | High | 7.8 | <1% | No |
Affected products
Also released in September 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.