{"id":"CVE-2026-65791","aliases":["EUVD-2026-56738","GHSA-748w-4ph6-frjx"],"status":"published","title":"Windows iSCSI Target Service Remote Code Execution Vulnerability","description":"Heap-based buffer overflow in Windows iSCSI Target Service 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":"2026-11-10","score":0.00974,"percentile":0.62363,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122"],"published":"2026-08-11T17:06:56Z","modified":"2026-10-30T17:22:41Z","products":[{"vendor":"microsoft","product":"windows 10 version 1607"},{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows server 2012"},{"vendor":"microsoft","product":"windows server 2012 (server core installation)"},{"vendor":"microsoft","product":"windows server 2012 r2"},{"vendor":"microsoft","product":"windows server 2012 r2 (server core installation)"},{"vendor":"microsoft","product":"windows server 2016"},{"vendor":"microsoft","product":"windows server 2016 (server core installation)"},{"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_1607"},{"vendor":"microsoft","product":"windows_10_1809"},{"vendor":"microsoft","product":"windows_server_2012"},{"vendor":"microsoft","product":"windows_server_2016"},{"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-2026-65791","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-65791"},{"url":"https://github.com/advisories/GHSA-748w-4ph6-frjx"}],"sources":{"cve":[{"id":"CVE-2026-65791","title":"Windows iSCSI Target Service Remote Code Execution Vulnerability","description":"Heap-based buffer overflow in Windows iSCSI Target Service allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-08-11T17:06:56.472Z","modified":"2026-10-30T17:22:41.952Z","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-122"],"updated_at":"2026-11-02T13:37:13.934727Z"}],"euvd":[{"id":"EUVD-2026-56738","description":"Heap-based buffer overflow in Windows iSCSI Target Service allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-08-11T17:06:56Z","modified":"2026-10-30T17:22:41Z","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":"2026-11-02T16:59:03.451007Z"}],"ghsa":[{"id":"GHSA-748w-4ph6-frjx","title":"Heap-based buffer overflow in Windows iSCSI Target Service allows an unauthorized attacker to...","description":"Heap-based buffer overflow in Windows iSCSI Target Service allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-08-11T18:31:39Z","modified":"2026-08-11T18:31:45Z","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-122"],"updated_at":"2026-11-02T15:10:20.045782Z"}],"nvd":[{"id":"CVE-2026-65791","description":"Heap-based buffer overflow in Windows iSCSI Target Service allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-08-11T17:18:59.053Z","modified":"2026-08-16T19:17:19.6Z","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-122"],"updated_at":"2026-11-02T14:12:36.880938Z"}]}}