Patch tracker / CVE reference / CVE-2026-25172

CVE-2026-25172

CVE-2026-25172 is a Microsoft vulnerability that Microsoft rates Important, with a CVSS score of 8.0 (High). Microsoft has shipped the fix: deploy one of the 14 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.

Risk summary

High
8.0
CVSS v3
4.9%
EPSS, 30 days
High
Severity

Not in the CISA KEV catalog. EPSS exploit probability 4.9%. CVSS 8.0 (High).

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

Senserva AI Opinion for CVE-2026-25172

A High Severity CVSS 8.8 remote code execution flaw in Windows Routing and Remote Access Service, notable for affecting the newest client builds: Windows 11 26H1 on x64 and ARM64 alongside Windows 10 1809. RRAS has absorbed dozens of RCE findings over recent years, but the low 4 percent EPSS reflects its saving grace: the service is not installed by default and most exploitation paths require the victim to connect out to a malicious server. Risk concentrates on servers actually running RRAS as a VPN or router.

Do this: Inventory which systems actually run the RRAS role, patch those first, and let client builds pick up the fix through normal update rings.

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

Senserva AI Opinion and rich prompt for CVE-2026-25172

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

Schedule normally
No exploitation observed as of 2026-10-14: not in the CISA KEV catalog, EPSS 5%.
Fixed by KB5078734 and 13 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-2026-25172

Moderate priority: schedule it in your normal patch cycle. In Intune or Defender, confirm whether the fixing updates KB5078734, KB5078736, KB5078737, KB5078740, KB5078752, KB5078766, KB5078774, KB5078775, KB5078883, KB5078885, KB5078938, KB5079466, KB5079473, KB5084597 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-2026-25172. 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.

KB5078734KB5078736KB5078737KB5078740KB5078752KB5078766KB5078774KB5078775KB5078883KB5078885KB5078938KB5079466KB5079473KB5084597

Scope and sources

Affected products
Fixed by the same updates
CVE-2025-54518CVE-2026-23669CVE-2026-24283CVE-2026-25177CVE-2026-25188CVE-2026-25173CVE-2026-26111CVE-2026-23672
Authoritative references
Official CVE record (cve.org)NVD detailMicrosoft MSRCFIRST.org EPSS

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

New to a term on this page? CVE, KB, KEV, CVSS, and EPSS are each explained once, on the Senserva security lexicon. Reference: Microsoft CVE and vulnerability management and the Microsoft patching guide.
All information provided as is, without warranty; verify against the vendor advisory before acting. All information and usage is subject to the Senserva EULA. Data notice and terms.