CVE-2026-83999High· 7.0▾ TwilightImproper link resolution before file access ('link following') in Windows Resilient File System (ReFS) Deduplication Service allows an authorized attacker to elevate privileges locally.
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 38.5 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 9.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
Last analysed / modified upstream
Improper link resolution before file access ('link following') in Windows Resilient File System (ReFS) Deduplication Service allows an authorized attacker to elevate privileges locally.
windows_11_24h2 < 10.0.26100.9445windows_11_25h2 < 10.0.26200.9445windows_11_26h1 < 10.0.28000.2954windows_server_2025 < 10.0.26100.33438Upgrade past the affected range:
windows_11_24h2 10.0.26100.9445windows_11_25h2 10.0.26200.9445windows_11_26h1 10.0.28000.2954windows_server_2025 10.0.26100.33438Connected by shared product, vendor, weakness, or advisory.
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