CVE-2026-40409High· 7.8▾ TwilightWindows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · 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. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.3%
Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability
windows_10_version_1607 >= 10.0.14393.0 < 10.0.14393.9234windows_10_version_1809 >= 10.0.17763.0 < 10.0.17763.8880windows_10_version_21h2 >= 10.0.19044.0 < 10.0.19044.7417windows_10_version_22h2 >= 10.0.19045.0 < 10.0.19045.7417windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7219windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7219windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.8655windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.8655windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2269windows_server_2012 >= 6.2.9200.0 < 6.2.9200.26132windows_server_2012_server_core_installation >= 6.2.9200.0 < 6.2.9200.26132windows_server_2012_r2 >= 6.3.9600.0 < 6.3.9600.23228windows_server_2012_r2_server_core_installation >= 6.3.9600.0 < 6.3.9600.23228windows_server_2016 >= 10.0.14393.0 < 10.0.14393.9234windows_server_2016_server_core_installation >= 10.0.14393.0 < 10.0.14393.9234windows_server_2019 >= 10.0.17763.0 < 10.0.17763.8880windows_server_2019_server_core_installation >= 10.0.17763.0 < 10.0.17763.8880windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5256windows_server_2025 >= 10.0.26100.0 < 10.0.26100.32995windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.32995Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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