cve 2026 56648

This tag tracks cve 2026 56648 (CVE-2026-56648), a high-severity elevation-of-privilege vulnerability in Windows Network File System (NFS) Server. Microsoft addressed the issue in the July 14, 2026 security updates. The flaw is described as a time-of-check, time-of-use (TOCTOU) race condition that an authorized attacker could exploit over a network to elevate privileges. Coverage focuses on systems running Server for NFS, applying the applicable cumulative update, and confirming that NFS-exposed systems have reached a patched build. Microsoft’s reported CVSS score is 7.5, making update deployment and post-update verification the central remediation steps for affected Windows server environments.