{"id":"CVE-2026-88102","aliases":["EUVD-2026-99653","GHSA-8vp3-xxj6-qx5c"],"status":"published","title":"Microsoft Failover Cluster Remote Code Execution Vulnerability","description":"Use after free in Windows Failover Cluster allows an unauthorized attacker to execute code over a network.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00634,"percentile":0.50834,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-416"],"published":"2026-10-13T19:00:21Z","modified":"2026-11-10T20:39:15Z","products":[{"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_server_2019"},{"vendor":"microsoft","product":"windows_server_2022"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88102","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88102"},{"url":"https://github.com/advisories/GHSA-8vp3-xxj6-qx5c"}],"sources":{"cve":[{"id":"CVE-2026-88102","title":"Microsoft Failover Cluster Remote Code Execution Vulnerability","description":"Use after free in Windows Failover Cluster allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-10-13T19:00:21.576Z","modified":"2026-11-10T20:39:15.912Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical","assessor":"cna"}],"cwes":["CWE-416"],"updated_at":"2026-11-10T22:18:29.471829Z"}],"euvd":[{"id":"EUVD-2026-99653","description":"Use after free in Windows Failover Cluster allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-10-13T19:00:21Z","modified":"2026-11-10T20:39:15Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical"}],"updated_at":"2026-11-10T22:23:59.037992Z"}],"ghsa":[{"id":"GHSA-8vp3-xxj6-qx5c","title":"Use after free in Windows Failover Cluster allows an unauthorized attacker to execute code over a...","description":"Use after free in Windows Failover Cluster allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-10-13T21:36:36Z","modified":"2026-10-13T21:36:37Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T15:13:18.544547Z"}],"nvd":[{"id":"CVE-2026-88102","description":"Use after free in Windows Failover Cluster allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-10-13T19:21:28.217Z","modified":"2026-10-16T15:42:02.13Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:12:58.13117Z"}]}}