--- title: "CVE-2026-102227: Microsoft Windows Resilient File System - Buffer Overflow" description: "Microsoft Windows Resilient File System (ReFS) contains a heap-based buffer overflow caused by improper memory handling, letting authorized attackers execute code locally, exploit requires local access with authorization." url: https://panop.io/threat-heartbeat/CVE-2026-102227/ --- # CVE-2026-102227 Microsoft Windows Resilient File System - Buffer Overflow Microsoft Windows Resilient File System (ReFS) contains a heap-based buffer overflow caused by improper memory handling, letting authorized attackers execute code locally, exploit requires local access with authorization. CVSS base score 7.8 /10 High CISA KEV Not listed Public exploit None known Authentication Required EPSS 0.32% chance of exploitation in 30 days [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-102227) ## Details Type Buffer Overflow Impact Remote Code Execution CVSS vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Published 13 October 2026 Updated 15 October 2026 Weakness [CWE-122](https://cwe.mitre.org/data/definitions/122.html) ## Vendor fix Update to the latest Windows version with security patches. Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them. ## References - [https://nvd.nist.gov/vuln/detail/CVE-2026-102227](https://nvd.nist.gov/vuln/detail/CVE-2026-102227) - [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-102227](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-102227) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)