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cve 2026 21251

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    CVE-2026-21251: Hardening Windows Failover Clusters Against CCF Elevation of Privilege

    Microsoft’s Security Response Center has published an advisory entry for CVE‑2026‑21251 — labeled as a Cluster Client Failover (CCF) elevation‑of‑privilege issue — and paired it with a confidence rating that deserves immediate attention from Windows administrators, security teams, and anyone who...
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    • cve 2026 21251 elevation of privilege failover clusters windows security
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