Patch tracker / CVE reference / CVE-2026-26111

CVE-2026-26111

CVE-2026-26111 is a high severity Microsoft vulnerability with a CVSS score of 8.8. 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

8.8

CVSS

4.7%

EPSS, 30 days

High

Severity

Not in the CISA KEV catalog. EPSS exploit probability 4.7%. CVSS 8.8 (High).

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

Senserva AI Opinion for CVE-2026-26111

A Routing and Remote Access Service remote code execution flaw on Windows 10 1809 and Server 2019, High Severity at CVSS 8.8, EPSS 4 percent. Server 2019 is where RRAS exposure is real: that generation of servers frequently runs RRAS as the corporate VPN endpoint, reachable from the internet by design. A VPN server compromise hands the attacker a pre-built tunnel into the internal network.

Do this: Identify Server 2019 machines running RRAS as VPN endpoints and patch those before any other system affected by this CVE.

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

Senserva AI Opinion and rich prompt for CVE-2026-26111

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-2026-26111 (source: https://senserva.com/cve/CVE-2026-26111.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- CVE-2026-26111: High severity Microsoft vulnerability, CVSS 8.8
- EPSS 30-day exploitation probability: 4.7%
- Actively exploited (CISA KEV): no
- Fixed by: KB5078734, KB5078736, KB5078737, KB5078740, KB5078752, KB5078766, KB5078774, KB5078775, KB5078883, KB5078885, KB5078938, KB5079466, KB5079473, KB5084597
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 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-2026-26111

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-2026-26111. 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.

KB5078734 KB5078736 KB5078737 KB5078740 KB5078752 KB5078766 KB5078774 KB5078775 KB5078883 KB5078885 KB5078938 KB5079466 KB5079473 KB5084597

Scope and sources

Affected products

Fixed by the same updates

CVE-2025-54518 CVE-2026-42825 CVE-2026-23667 CVE-2026-23668 CVE-2026-23669 CVE-2026-23671 CVE-2026-23672 CVE-2026-23673

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.