{"id":"CVE-2026-83518","aliases":["EUVD-2026-99299","GHSA-jr84-qg44-hh67"],"status":"published","title":"RPC Runtime Elevation of Privilege Vulnerability","description":"Heap-based buffer overflow in RPC Runtime allows an authorized attacker to elevate privileges locally.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/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":"2026-11-11","score":0.00379,"percentile":0.32277,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122"],"published":"2026-10-13T18:59:46Z","modified":"2026-11-10T20:35:55Z","products":[{"vendor":"microsoft","product":"windows 11 version 23h2"},{"vendor":"microsoft","product":"windows 11 version 24h2"},{"vendor":"microsoft","product":"windows 11 version 25h2"},{"vendor":"microsoft","product":"windows 11 version 26h1"},{"vendor":"microsoft","product":"windows_11_23h2"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_11_25h2"},{"vendor":"microsoft","product":"windows_11_26h1"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83518","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-83518"},{"url":"https://github.com/advisories/GHSA-jr84-qg44-hh67"}],"sources":{"cve":[{"id":"CVE-2026-83518","title":"RPC Runtime Elevation of Privilege Vulnerability","description":"Heap-based buffer overflow in RPC Runtime allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-10-13T18:59:46.324Z","modified":"2026-11-10T20:35:55.387Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/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":"2026-11-10T22:18:28.707469Z"}],"euvd":[{"id":"EUVD-2026-99299","description":"Heap-based buffer overflow in RPC Runtime allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-10-13T18:59:46Z","modified":"2026-11-10T20:35:55Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T21:23:23.099302Z"}],"ghsa":[{"id":"GHSA-jr84-qg44-hh67","title":"Heap-based buffer overflow in RPC Runtime allows an authorized attacker to elevate privileges...","description":"Heap-based buffer overflow in RPC Runtime allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-10-13T21:34:26Z","modified":"2026-10-13T21:34:33Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T15:13:16.244853Z"}],"nvd":[{"id":"CVE-2026-83518","description":"Heap-based buffer overflow in RPC Runtime allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-10-13T19:19:57.633Z","modified":"2026-10-29T18:11:23.857Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:12:57.603498Z"}]}}