{"id":"CVE-2026-112971","aliases":["EUVD-2026-121895","GHSA-76qm-whpj-76g2"],"status":"published","title":"Windows SMB Client Elevation of Privilege Vulnerability","description":"Heap-based buffer overflow in Windows SMB Client allows an authorized attacker to elevate privileges locally.","severity":{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-14","score":0.00307,"percentile":0.23874,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122"],"published":"2026-11-10T18:18:28Z","modified":"2026-11-10T21:32:50Z","products":[{"vendor":"microsoft","product":"windows 11 version 26h1"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-112971","tags":["vendor-advisory","patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112971"},{"url":"https://github.com/advisories/GHSA-76qm-whpj-76g2"}],"sources":{"cve":[{"id":"CVE-2026-112971","title":"Windows SMB Client Elevation of Privilege Vulnerability","description":"Heap-based buffer overflow in Windows SMB Client allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-11-10T18:18:28.134Z","modified":"2026-11-13T18:07:20.255Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-122"],"updated_at":"2026-11-10T19:39:58.44836Z"}],"euvd":[{"id":"EUVD-2026-121895","description":"Heap-based buffer overflow in Windows SMB Client allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-11-10T18:18:28Z","modified":"2026-11-13T18:07:20Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T23:24:32.765041Z"}],"ghsa":[{"id":"GHSA-76qm-whpj-76g2","title":"Heap-based buffer overflow in Windows SMB Client allows an authorized attacker to elevate...","description":"Heap-based buffer overflow in Windows SMB Client allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-11-10T21:32:44Z","modified":"2026-11-10T21:32:50Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-122"],"updated_at":"2026-11-10T21:57:50.285633Z"}],"nvd":[{"id":"CVE-2026-112971","description":"Heap-based buffer overflow in Windows SMB Client allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-11-10T19:18:47.667Z","modified":"2026-11-10T21:18:39.32Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-122"],"updated_at":"2026-11-11T00:21:54.23974Z"}]}}