Patch tracker / KB5002740

KB5002740: Office Online Server Security Update (July 2025)

KB5002740 is a High security update for Office Online Server, released 2025-07-08. It closes 3 CVEs with a maximum CVSS of 8.4. Get it from the Microsoft Update Catalog below, and see where it sits against the rest of the month on the patch tracker.

High

Update summary

Released
2025-07-08
CVEs fixed
3
Max CVSS
8.4
Severity
High
Deploy this cycle
Fixes 3 CVEs for Office Online Server. No confirmed in-the-wild exploitation in this set today.
Microsoft Update Catalog: download KB5002740Microsoft support article
A newer security update for Office Online Server has shipped since this one: KB5002884 (2026-07-14). For cumulative update families the newer package includes these fixes.

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 KB5002740

KB5002740 fixes three CVEs, CVE-2025-48812, CVE-2025-49711, and CVE-2025-49697, High severity up to CVSS 8.4, in Office Online Server and Office 2019 from July 2025. The 8.4 top score and multiple CVEs make this one of the more important July fixes to apply promptly.

Do this: Prioritize KB5002740 for Office Online Server and Office 2019 given its 8.4 CVSS score across three CVEs.

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

Senserva AI Opinion and rich prompt for KB5002740

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

Full tracking and change history for KB5002740

Released
2025-07-08
Last changed
2025-07-08
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.

Exploitation and severity

Fixes 3 CVEs. Most severe CVSS 8.4 (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 KB5002740 is missing on your devices.

Check if KB5002740 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.

CVESeverityCVSSEPSSExploited
CVE-2025-48812High8.4<1%No
CVE-2025-49697High8.42.8%No
CVE-2025-49711High8.4<1%No

Affected products

Also released in July 2025

The highest-risk updates from the same release:

KB5002753KB5002754KB5002759KB5002760KB5002768KB5002741KB5002744KB5002751

The full month, summarized: Microsoft Patch Tuesday.

Authoritative references

Official KB5002740 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.
Data notice: this page, the feeds, and the API are provided as is, for informational purposes only, without warranty of any kind. Senserva, LLC does not guarantee the accuracy, completeness, or timeliness of third-party data (MSRC, NVD, CISA KEV, EPSS) and accepts no liability for actions taken based on it; verify against the authoritative vendor advisory before acting. Built daily with Senserva Trustworthy AI. All use of this data is subject to the Senserva EULA.