Patch tracker / CVE reference / CVE-2025-59287

CVE-2025-59287

CVE-2025-59287 is a critical severity Microsoft vulnerability with a CVSS score of 9.8. It is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it in the wild, which makes it a fix-first item. Microsoft has shipped the fix: deploy one of the 9 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.

Risk summary

CriticalCISA KEV

9.8

CVSS

100%

EPSS, 30 days

Critical

Severity

Yes

Exploited in the wild

Listed in the CISA Known Exploited Vulnerabilities catalog, confirmed exploited in the wild. EPSS exploit probability 100%. CVSS 9.8 (Critical).

This CVE is among the top 5% of tracked Microsoft CVEs by EPSS exploit probability, and one of 4 actively-exploited CVEs in October 2025.

Senserva AI Opinion for CVE-2025-59287

This is an unauthenticated remote code execution flaw in the Windows Server Update Service role on Server 2019 and 2022, and the exposure is unusual because WSUS servers are trusted distribution points that push patches to your entire fleet. CISA confirmed active exploitation on 2025-10-24, EPSS puts exploit probability at 100 percent, and the CVSS score is 9.8, so any internet reachable or laterally reachable WSUS instance should be treated as an active target.

Do this: Apply Microsoft's October update to every WSUS server running Server 2019 or 2022 today, and until patched block inbound access to the WSUS ports (8530 and 8531) from untrusted networks.

AI-generated from public data, 2026-07-24. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for CVE-2025-59287

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-2025-59287 (source: https://senserva.com/cve/CVE-2025-59287.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- CVE-2025-59287: Critical severity Microsoft vulnerability, CVSS 9.8
- EPSS 30-day exploitation probability: 100%
- Actively exploited (CISA KEV): YES
- Fixed by: KB5070879, KB5070881, KB5070882, KB5070883, KB5070884, KB5070886, KB5070887, KB5070892, KB5070893
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 now

Exploited in the wild: confirmed by the CISA KEV catalog, not predicted.

Fixed by KB5070879 and 8 more (by build, listed below). Download from the Microsoft Update Catalog, or deploy via Windows Update, Intune, or WSUS.

Do this now: Patch now and verify deployment on every exposed device.

Official patch(es) for CVE-2025-59287

Treat as urgent: it is being exploited in the wild (CISA KEV), so patch ahead of items that are not. In Intune or Defender, confirm whether the fixing updates KB5070879, KB5070881, KB5070882, KB5070883, KB5070884, KB5070886, KB5070887, KB5070892, KB5070893 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-2025-59287. 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.

KB5070879 KB5070881 KB5070882 KB5070883 KB5070884 KB5070886 KB5070887 KB5070892 KB5070893

Scope and sources

Affected products

Authoritative references

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

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