Patch tracker / CVE reference / CVE-2026-25189

CVE-2026-25189

CVE-2026-25189 is a Microsoft vulnerability that Microsoft rates Important, with a CVSS score of 7.8 (High). Microsoft has shipped the fix: deploy one of the 4 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

4.9%

EPSS, 30 days

High

Severity

Not in the CISA KEV catalog. EPSS exploit probability 4.9%. CVSS 7.8 (High).

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

Senserva AI Opinion for CVE-2026-25189

The DWM Core Library flaw gives attackers an escalation path through the desktop compositor on Windows 10 1809 and Windows Server 2019. It is High Severity at CVSS 8.8 with EPSS at 4 percent. DWM vulnerabilities have been chained with browser and document exploits in past campaigns, which keeps this class relevant beyond its raw score.

Do this: Roll the update into the same pass as your browser patching so the chain has no weak link.

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

Senserva AI Opinion and rich prompt for CVE-2026-25189

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-2026-25189 (source: https://senserva.com/cve/CVE-2026-25189.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed daily (early morning US Central)):
- CVE-2026-25189: Microsoft vulnerability, Microsoft rating Important, CVSS 7.8 (High)
- EPSS 30-day exploitation probability: 4.9%
- Actively exploited (CISA KEV): no
- Fixed by: KB5078737, KB5078752, KB5078766, KB5078885
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 as of 2026-10-14: not in the CISA KEV catalog, EPSS 5%.

Fixed by KB5078737 and 3 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-2026-25189

Moderate priority: schedule it in your normal patch cycle. In Intune or Defender, confirm whether the fixing updates KB5078737, KB5078752, KB5078766, KB5078885 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-2026-25189. 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.

KB5078737 KB5078752 KB5078766 KB5078885

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

CVE-2026-25189

Risk summary

Official patch(es) for CVE-2026-25189

Scope and sources