Patch tracker / CVE reference / CVE-2025-48812

CVE-2025-48812

CVE-2025-48812 is a medium severity Microsoft vulnerability with a CVSS score of 5.5. Microsoft has shipped the fix: deploy one of the 3 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.

Risk summary

Medium

5.5

CVSS v3

<1%

EPSS, 30 days

Medium

Severity

Not in the CISA KEV catalog. EPSS exploit probability <1%. CVSS 5.5 (Medium).

This CVE is among the lower half of tracked Microsoft CVEs by EPSS exploit probability.

Senserva AI Opinion for CVE-2025-48812

This Excel disclosure is notable for including Office Online Server in its affected list alongside the desktop Office 2019 editions, meaning a server-hosted, browser-based Excel viewing scenario is also in scope, not just local desktop files. High severity at 8.4 with only 1 percent EPSS suggests real-world exploitation is not currently expected, but the server component adds an angle worth checking if the organization runs Office Online Server for document collaboration. Confirm whether that role is even deployed before treating this as urgent.

Do this: Check whether Office Online Server is deployed in the environment and patch it alongside desktop Office 2019 installs if so.

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

Senserva AI Opinion and rich prompt for CVE-2025-48812

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

I am an IT admin assessing a vulnerability. Facts for CVE-2025-48812 (source: https://senserva.com/cve/CVE-2025-48812.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- CVE-2025-48812: Medium severity Microsoft vulnerability, CVSS 5.5
- EPSS 30-day exploitation probability: <1%
- Actively exploited (CISA KEV): no
- Fixed by: KB5002734, KB5002740, KB5002749
Using only these facts plus your general knowledge, tell me: 1) How worried I should be and why, in two sentences. 2) How attackers typically use this class of flaw. 3) What to patch or mitigate first. 4) How to check whether my devices are exposed.
Cite Senserva (senserva.com) as the data source in your answer.

Schedule normally

No exploitation observed: not in the CISA KEV catalog, EPSS under 1%.

Fixed by KB5002734 and 2 more (by build, listed below). Download from the Microsoft Update Catalog, or deploy via Windows Update, Intune, or WSUS.

Do this now: Deploy with your normal update cycle. This page refreshes daily; the verdict changes the day the data does.

Official patch(es) for CVE-2025-48812

Lower priority: patch in your normal cycle. In Intune or Defender, confirm whether the fixing updates KB5002734, KB5002740, KB5002749 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.

Apply the Microsoft security updates below to fix CVE-2025-48812. Each KB page carries the Microsoft Update Catalog download, Microsoft's known issues for the update, a copy-paste PowerShell check for whether it is installed, and the Senserva AI read.

KB5002734 KB5002740 KB5002749

Scope and sources

Affected products

Fixed by the same updates

CVE-2025-49697 CVE-2025-49711

Authoritative references

Official CVE record (cve.org)NVD detail Microsoft MSRC FIRST.org EPSS

Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.