CVE-2016-3227

CVE-2016-3227 is a critical vulnerability published on June 16, 2016. Use-after-free vulnerability in the DNS Server component in Microsoft Windows Server 2012 Gold and R2 allows remote attackers to execute arbitrary code via crafted requests, aka "Windows DNS Server Use After Free Vulnerability."

CVE-2016-3227 was first published in the National Vulnerability Database on June 16, 2016, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

CVE-2016-3227 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 95.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

CVE-2016-3227 has a CVSS v3 base score of 9.8 (NVD).

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-3227, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.