{"id":"CVE-2026-78444","aliases":["EUVD-2026-73800","GHSA-vp2w-vv5p-6vcv"],"status":"published","title":"Microsoft Failover Cluster Remote Code Execution Vulnerability","description":"Untrusted pointer dereference in Windows Failover Cluster allows an unauthorized attacker to execute code over a network.","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00707,"percentile":0.53878,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-822"],"published":"2026-09-08T17:18:23Z","modified":"2026-11-10T21:37:23Z","products":[{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows server 2019"},{"vendor":"microsoft","product":"windows server 2019 (server core installation)"},{"vendor":"microsoft","product":"windows server 2022"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_10_1809"},{"vendor":"microsoft","product":"windows_server_2019"},{"vendor":"microsoft","product":"windows_server_2022"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78444","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78444"},{"url":"https://github.com/advisories/GHSA-vp2w-vv5p-6vcv"}],"sources":{"cve":[{"id":"CVE-2026-78444","title":"Microsoft Failover Cluster Remote Code Execution Vulnerability","description":"Untrusted pointer dereference in Windows Failover Cluster allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-09-08T17:18:23.33Z","modified":"2026-11-10T21:37:23.629Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-822"],"updated_at":"2026-11-10T22:48:53.557052Z"}],"euvd":[{"id":"EUVD-2026-73800","description":"Untrusted pointer dereference in Windows Failover Cluster allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-09-08T17:18:23Z","modified":"2026-11-10T21:37:23Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T23:24:19.311812Z"}],"ghsa":[{"id":"GHSA-vp2w-vv5p-6vcv","title":"Untrusted pointer dereference in Windows Failover Cluster allows an unauthorized attacker to...","description":"Untrusted pointer dereference in Windows Failover Cluster allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-09-08T18:33:23Z","modified":"2026-09-08T18:34:09Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-822"],"updated_at":"2026-11-02T15:11:34.690977Z"}],"nvd":[{"id":"CVE-2026-78444","description":"Untrusted pointer dereference in Windows Failover Cluster allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-09-08T18:20:42.133Z","modified":"2026-09-11T21:17:16.287Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-822"],"updated_at":"2026-11-02T14:12:45.264578Z"}]}}