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. It is the ninth largest of the 32 updates Microsoft shipped that month, by CVEs closed.
Update summary
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.
A newer security update for Office Online Server has shipped since this one: KB5002884 (2026-08-11). For cumulative update families the newer package includes these fixes, so installing that one is usually the shorter path. Verify against your own update rings before you skip this package.
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
- Released
- 2025-09-09
- Last changed
- 2025-09-09
- Changes tracked
- 1
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.
Check if KB5002782 is installed
Elevated PowerShell. No output means it is not installed.
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 |
Scope and sources
- Affected products
- Also released in September 2025
KB5002775
3 CVEs · HighKB5002778
3 CVEs · HighKB5002784
1 CVE · HighKB5065220
2 CVEs · HighKB5065221
2 CVEs · HighKB5065222
3 CVEs · HighKB5065223
3 CVEs · HighKB5065224
3 CVEs · HighThe full month, summarized: Microsoft Patch Tuesday.
- Authoritative references
See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.