Patch tracker / CVE reference / CVE-2025-26668

CVE-2025-26668

CVE-2025-26668 is a Microsoft vulnerability that Microsoft rates Important, with a CVSS score of 7.5 (High). Its EPSS score puts the probability of exploitation in the next 30 days at 14%. 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.

Our data comes from Microsoft, CISA and other public sources, and it can be wrong or out of date. If you are unsure, check the linked source before you act, and tell us when we are wrong so we can fix it.

Risk summary

High
7.5
CVSS v3
14%
EPSS, 30 days
High
Severity

Not in the CISA KEV catalog. EPSS exploit probability 14%. CVSS 7.5 (High).

This CVE is among the top 25% of tracked Microsoft CVEs by EPSS exploit probability.

Senserva AI Opinion for CVE-2025-26668

A remote code execution flaw in Windows Routing and Remote Access Service, rated High Severity at CVSS 8.8 with an 18 percent exploit probability, on Windows 10 1809 and Server 2019. RRAS has been a repeat offender in recent years, racking up RCE advisories cycle after cycle, and servers running it are usually VPN or routing boxes positioned at network boundaries. Perimeter position plus code execution is the combination that turns one bug into full network access.

Do this: Patch Server 2019 machines running RRAS first, and disable the role on servers where it was enabled but is not actually routing.

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

Senserva AI Opinion and rich prompt for CVE-2025-26668

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

Patch this cycle
Not confirmed exploited yet, but the 30-day exploit probability is high (EPSS 14%).
Fixed by KB5055518 and 13 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-2025-26668

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 KB5055518, KB5055519, KB5055521, KB5055523, KB5055526, KB5055527, KB5055528, KB5055547, KB5055557, KB5055561, KB5055570, KB5055581, KB5055596, KB5055609 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-2025-26668. 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.

KB5055518KB5055519KB5055521KB5055523KB5055526KB5055527KB5055528KB5055547KB5055557KB5055561KB5055570KB5055581KB5055596KB5055609

Scope and sources

Affected products
Fixed by the same updates
CVE-2025-29824CVE-2025-21205CVE-2025-21221CVE-2025-21222CVE-2025-26647CVE-2025-26669CVE-2025-27477CVE-2025-27481
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.
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