Patch tracker / KB5002752

KB5002752: Office Online Server Security Update (August 2025)

KB5002752 is a High security update for Office Online Server, released 2025-08-12. It closes 5 CVEs with a maximum CVSS of 7.8. It is the 17th largest of the 44 updates Microsoft shipped that month, by CVEs closed.

Update summary

High
2025-08-12
Released
5
CVEs fixed
7.8
Max CVSS v3
High
Severity
Deploy this cycle
Fixes 5 CVEs for Office Online Server. No confirmed in-the-wild exploitation in this set today.

Fixes 5 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.

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: KB5002928 (2026-10-13). 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 KB5002752Microsoft support article
Senserva AI Opinion for KB5002752

KB5002752 patches 5 CVEs across Office 2019 (32-bit and 64-bit) and Office Online Server, with the most serious rated High severity at CVSS 7.8. None are on the CISA KEV list and EPSS peaks at just 1 percent, so there is no evidence of active exploitation yet, but the inclusion of Office Online Server means server-side document handling is in scope, not just desktop clients.

Do this: Deploy KB5002752 to your Office 2019 desktop fleet and any Office Online Server instances, prioritizing the server-side install since it handles 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 KB5002752

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

Full tracking and change history for KB5002752

Released
2025-08-12
Last changed
2026-09-26
Changes tracked
2

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 KB5002752 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.

CVESeverityCVSSEPSSExploited
CVE-2025-53735High7.8<1%No
CVE-2025-53737High7.8<1%No
CVE-2025-53739High7.8<1%No
CVE-2025-53741High7.8<1%No
CVE-2025-53759High7.8<1%No

Scope and sources

Affected products
Also released in August 2025

KB5063709

44 CVEs · Critical

KB5063812

56 CVEs · Critical

KB5063871

48 CVEs · Critical

KB5063875

47 CVEs · Critical

KB5063877

54 CVEs · Critical

KB5063878

61 CVEs · Critical

KB5063880

56 CVEs · Critical

KB5063888

34 CVEs · Critical

The full month, summarized: Microsoft Patch Tuesday.

Authoritative references
Official KB5002752 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.
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