CVE-2026-56649Medium· 5.9▾ SunlitConcurrent execution using shared resource with improper synchronization ('race condition') in Windows Network File System allows an unauthorized attacker to execute code over a network.
▾ Sunlit zone — Low / medium · no exploitation signal
impact 32.5 · likelihood 0.1 · 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 Jul 18.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.7%
0.7% → 0.7%
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Network File System allows an unauthorized attacker to execute code over a network.
windows_10_1607 < 10.0.14393.9339windows_10_1809 < 10.0.17763.9020windows_10_21h2 < 10.0.19044.7548windows_10_22h2 < 10.0.19045.7548windows_11_24h2 < 10.0.26100.8875windows_11_25h2 < 10.0.26200.8875windows_11_26h1 < 10.0.28000.2269windows_server_2012windows_server_2012 = r2windows_server_2016 < 10.0.14393.9339windows_server_2019 < 10.0.17763.9020windows_server_2022 < 10.0.20348.5386windows_server_2025 < 10.0.26100.33158Upgrade past the affected range:
windows_10_1607 10.0.14393.9339windows_10_1809 10.0.17763.9020windows_10_21h2 10.0.19044.7548windows_10_22h2 10.0.19045.7548windows_11_24h2 10.0.26100.8875windows_11_25h2 10.0.26200.8875windows_11_26h1 10.0.28000.2269windows_server_2016 10.0.14393.9339windows_server_2019 10.0.17763.9020windows_server_2022 10.0.20348.5386windows_server_2025 10.0.26100.33158Connected by shared product, vendor, weakness, or advisory.
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