Patch tracker / CVE reference / CVE-2025-59509

CVE-2025-59509

CVE-2025-59509 is a medium severity Microsoft vulnerability with a CVSS score of 5.5. Microsoft has shipped the fix: deploy one of the 8 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

6.0%

EPSS, 30 days

Medium

Severity

Not in the CISA KEV catalog. EPSS exploit probability 6.0%. CVSS 5.5 (Medium).

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

Senserva AI Opinion for CVE-2025-59509

Windows Speech Recognition on Version 1809 and Server 2019 is rated Critical at 9.8, but its EPSS score is only 6 percent, a reminder that the CVSS severity rating and the real-world exploitation forecast do not always move together. Speech Recognition is not commonly enabled on server builds, which likely helps keep the predicted exploitation probability lower than the raw severity would suggest. Still worth clearing in this update cycle since it ships in the same cumulative package as higher-risk fixes.

Do this: Patch alongside the rest of this cycle's 1809 and Server 2019 updates; no separate urgent action needed given the low EPSS.

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

Senserva AI Opinion and rich prompt for CVE-2025-59509

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-2025-59509 (source: https://senserva.com/cve/CVE-2025-59509.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- CVE-2025-59509: Medium severity Microsoft vulnerability, CVSS 5.5
- EPSS 30-day exploitation probability: 6.0%
- Actively exploited (CISA KEV): no
- Fixed by: KB5068779, KB5068781, KB5068787, KB5068791, KB5068840, KB5068861, KB5068865, KB5068966
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 6%.

Fixed by KB5068779 and 7 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-2025-59509

Lower priority: patch in your normal cycle. In Intune or Defender, confirm whether the fixing updates KB5068779, KB5068781, KB5068787, KB5068791, KB5068840, KB5068861, KB5068865, KB5068966 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-2025-59509. 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.

KB5068779 KB5068781 KB5068787 KB5068791 KB5068840 KB5068861 KB5068865 KB5068966

Scope and sources

Affected products

Fixed by the same updates

CVE-2025-62215 CVE-2025-60724 CVE-2025-64678 CVE-2025-60715 CVE-2025-62452 CVE-2025-59505 CVE-2025-59511 CVE-2025-59512

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.