Patch tracker / CVE reference / CVE-2025-26642

CVE-2025-26642

CVE-2025-26642 is a high severity Microsoft vulnerability with a CVSS score of 7.8. Its EPSS score puts the probability of exploitation in the next 30 days at 22%. Microsoft has shipped the fix: deploy one of the 6 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.

Risk summary

High

7.8

CVSS v3

22%

EPSS, 30 days

High

Severity

Not in the CISA KEV catalog. EPSS exploit probability 22%. CVSS 7.8 (High).

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

Senserva AI Opinion for CVE-2025-26642

This Office remote code execution flaw is notable for hitting both server-side rendering stacks at once: Office Online Server and SharePoint Server 2019, plus Office 2019 desktops, at High Severity, CVSS 8.8. With a 16 percent EPSS score, it is among the more likely of this cycle's Office bugs to see a working exploit.

Do this: Patch Office Online Server and SharePoint 2019 together, since a single malicious upload can reach both.

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

Senserva AI Opinion and rich prompt for CVE-2025-26642

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-2025-26642 (source: https://senserva.com/cve/CVE-2025-26642.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- CVE-2025-26642: High severity Microsoft vulnerability, CVSS 7.8
- EPSS 30-day exploitation probability: 22%
- Actively exploited (CISA KEV): no
- Fixed by: KB5002588, KB5002691, KB5002699, KB5002701, KB5002703, KB5002704
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.

Patch this cycle

Not confirmed exploited yet, but the 30-day exploit probability is high (EPSS 22%).

Fixed by KB5002588 and 5 more (by build, listed below). Download from the Microsoft Update Catalog, or deploy via Windows Update, Intune, or WSUS.

Do this now: Patch in this maintenance window; do not let it slip to the next one.

Official patch(es) for CVE-2025-26642

Elevated priority: high severity or a meaningful exploitation probability, sooner if an affected product is internet-facing. In Intune or Defender, confirm whether the fixing updates KB5002588, KB5002691, KB5002699, KB5002701, KB5002703, KB5002704 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-2025-26642. 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.

KB5002588 KB5002691 KB5002699 KB5002701 KB5002703 KB5002704

Scope and sources

Affected products

Fixed by the same updates

CVE-2025-29794 CVE-2025-27746 CVE-2025-27747 CVE-2025-27750 CVE-2025-27751 CVE-2025-29793

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.