Patch tracker / CVE reference / CVE-2025-26636
CVE-2025-26636
CVE-2025-26636 is a critical severity Microsoft vulnerability with a CVSS score of 9.8. Its EPSS score puts the probability of exploitation in the next 30 days at 22%. Microsoft has shipped the fix: deploy the update below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.
Critical severity Microsoft vulnerability, CVSS 9.8. Fixed by 1 Microsoft security update.
Risk summary
Updated July 24, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2025-26636
CVE-2025-26636 is a Windows Kernel information disclosure flaw rated Critical with a CVSS of 9.8, unusually high for a disclosure-class bug that typically leaks memory rather than granting direct control. It affects Windows Server 2025 including Server Core installations and Windows 11 Version 24H2 on ARM64 systems, so both your newest server builds and ARM-based endpoints are in scope. It is not in CISA KEV and has no confirmed ransomware use, but the 22 percent EPSS score signals meaningful near-term exploit interest.
Do this: Deploy the Microsoft patch for CVE-2025-26636 to Windows Server 2025 hosts, Server Core installs, and ARM64 Windows 11 24H2 devices, prioritizing Server Core systems that lack a full GUI for quick verification.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2025-26636
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2025-26636
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
Exploitation and severity
Not in the CISA KEV catalog. EPSS exploit probability 22%. CVSS 9.8 (Critical).
This CVE is among the top half of tracked Microsoft CVEs by EPSS exploit probability.
Official patch(es) for CVE-2025-26636
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 update KB5062553 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.
Apply the Microsoft security update below to fix CVE-2025-26636. 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.
Affected products
Common questions about CVE-2025-26636
Is CVE-2025-26636 actively exploited?
It is not currently listed in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score puts the probability of exploitation in the next 30 days at 22%.
What patch fixes CVE-2025-26636?
Microsoft fixed CVE-2025-26636 in KB5062553. Download from the Microsoft Update Catalog, or let Intune, Windows Update, or WSUS deliver it.
Which products are affected by CVE-2025-26636?
Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019.
Can I ask my own AI about CVE-2025-26636?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2025-26636's key facts: severity, CVSS, EPSS exploit probability, CISA KEV status, and the fixing KB. Copy it into Claude, ChatGPT, or Copilot for a triage plan; the data is refreshed three times a day (5 AM, 12:30 PM, and 7 PM US Central).
Fixed by the same update
If you are patching CVE-2025-26636, the same update also fixes these:
Authoritative references
Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.
