Patch tracker / KB5002684

KB5002684: Office Online Server Security Update (February 2025)

KB5002684 is a High security update for Office Online Server, released 2025-02-11. It closes 1 CVE with a maximum CVSS of 7.8. It is the 12th largest of the 17 updates Microsoft shipped that month, by CVEs closed.

Update summary

High
2025-02-11
Released
1
CVEs fixed
7.8
Max CVSS v3
High
Severity
Deploy this cycle
Fixes 1 CVE for Office Online Server. No confirmed in-the-wild exploitation in this set today.

Fixes 1 CVE. Most severe CVSS 7.8 (High). EPSS exploit probability up to <1%. Among the lower half of tracked Microsoft updates by EPSS exploit probability.

Senserva found thiswe track every release for this product line, so we can tell you this package is behind

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.

Microsoft Update Catalog: download KB5002684Microsoft support article
Senserva AI Opinion for KB5002684

KB5002684 fixes CVE-2025-21387, a High severity, CVSS 7.8 flaw shared with a broader five-CVE Office Online Server/Office 2019 fix released the same month. Servers and desktop clients on the affected builds should confirm they have the full set of February 2025 fixes, not just this narrower one. No CISA KEV or ransomware link applies to this CVE.

Do this: Apply KB5002684 and cross-check against the broader February 2025 Office Online Server update.

AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for KB5002684

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

Full tracking and change history for KB5002684

Released
2025-02-11
Last changed
2025-02-11
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 KB5002684 is installed

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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.

CVESeverityCVSSEPSSExploited
CVE-2025-21387High7.81.1%No

Scope and sources

Affected products
Also released in February 2025

KB5052016

21 CVEs · High · exploited

KB5052020

23 CVEs · High · exploited

KB5052032

20 CVEs · High · exploited

KB5052038

20 CVEs · High · exploited

KB5052042

23 CVEs · High · exploited

KB5052072

19 CVEs · High · exploited

KB5052105

37 CVEs · High · exploited

KB5052106

33 CVEs · High · exploited

The full month, summarized: Microsoft Patch Tuesday.

Authoritative references
Official KB5002684 page (Microsoft Support)Microsoft Update CatalogMicrosoft Security Update Guide

See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.

New to a term on this page? CVE, KB, KEV, CVSS, and EPSS are each explained once, on the Senserva security lexicon. Reference: Microsoft CVE and vulnerability management and the Microsoft patching guide.
Provided as is, without warranty; verify against the vendor advisory before acting. Data notice and terms.