{"id":"CVE-2026-72989","title":"Use of uninitialized resource in Windows Failover Cluster allows an unauthorized attacker to disclose information over a network.","summary":"Use of uninitialized resource in Windows Failover Cluster allows an unauthorized attacker to disclose information over a network.","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-908"],"vendor":"microsoft","product":"windows_10_1809","affected":["windows_10_1809 < 10.0.17763.9245","windows_server_2019 < 10.0.17763.9245","windows_server_2022 < 10.0.20348.5622","windows_server_2025 < 10.0.26100.33438"],"patched":["windows_10_1809 10.0.17763.9245","windows_server_2019 10.0.17763.9245","windows_server_2022 10.0.20348.5622","windows_server_2025 10.0.26100.33438"],"published":"2026-09-08","updated":"2026-09-21","sourceUpdated":"2026-09-21T15:33:38.630","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-72989","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72989","label":"secure@microsoft.com"}],"tags":["nvd","cve.org"],"epss":0.00787,"epssPercentile":0.54221,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-08T19:43:55.521386Z"},"ingestedAt":"2026-09-08T19:08:49.626Z","slug":"CVE-2026-72989","body":"## Overview\n\nUse of uninitialized resource in Windows Failover Cluster allows an unauthorized attacker to disclose information over a network.\n\n## Affected\n\n- `windows_10_1809 < 10.0.17763.9245`\n- `windows_server_2019 < 10.0.17763.9245`\n- `windows_server_2022 < 10.0.20348.5622`\n- `windows_server_2025 < 10.0.26100.33438`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `windows_10_1809 10.0.17763.9245`\n- `windows_server_2019 10.0.17763.9245`\n- `windows_server_2022 10.0.20348.5622`\n- `windows_server_2025 10.0.26100.33438`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}