Is CVE-2026-83999 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-83999?

CVE-2026-83999 has a CVSS v3 severity of HIGH (7).

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CVE-2026-83999

Description

Improper link resolution before file access ('link following') in Windows Resilient File System (ReFS) Deduplication Service allows an authorized attacker to elevate privileges locally.