{"id":"CVE-2026-105544","kind":"vulnerability","aliases":["CVE-2026-105544"],"related":[],"title":".NET: improper access control lets a local user gain higher privileges","description":"Improper access control in .NET allows an authorized attacker to elevate privileges locally.","summary":".NET has an access control flaw that lets an already-authorized local user elevate their privileges. An attacker who can run code or log in on the machine could gain rights beyond what they were given.","severity":"high","cvss":7.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["dotnet","runtime"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:17:56+00:00","first_seen_at":"2026-11-10T19:24:19+00:00","triaged_at":"2026-11-10T19:47:31+00:00","updated_at":"2026-11-10T19:47:31+00:00","category":"runtime","confidence":0.5,"triage":{"at":"2026-11-10T19:47:31Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":".NET: improper access control lets a local user gain higher privileges","impact":"high","summary":".NET has an access control flaw that lets an already-authorized local user elevate their privileges. An attacker who can run code or log in on the machine could gain rights beyond what they were given.","audience":"businesses","category":"runtime","nicknames":[],"who_cares":["dotnet"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user gains elevated privileges on the machine","analyst_note":"Find the Microsoft .NET advisory for CVE-2026-105544 to confirm affected and fixed versions and how_to_check steps.","how_to_check":"- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"The sources only describe a local privilege escalation in .NET by an authorized attacker; they do not name affected versions or configurations. Teams running .NET applications on shared or multi-user machines should look for the advisory details. unknown","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000648,"input_tokens":4470,"output_tokens":403,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find the Microsoft .NET advisory for CVE-2026-105544 to confirm affected and fixed versions and how_to_check steps.","search":"'-105544':14A,17A '-2026':13A,16A 'access':3A,23B,58C 'allow':62C 'alreadi':30B 'already-author':29B 'attack':38B,65C 'author':31B,64C 'beyond':52B 'code':42B 'control':4A,24B,59C 'could':49B 'cve':12A,15A 'dotnet':18B 'elev':34B,67C 'flaw':25B 'gain':9A,50B 'given':56B 'higher':10A 'improp':2A,57C 'let':5A,27B 'local':7A,32B,69C 'log':44B 'machin':48B 'net':1A,20B,61C 'privileg':11A,36B,68C 'right':51B 'run':41B 'runtim':19B 'user':8A,33B","nicknames":[],"mitigations":[],"who_affected":"The sources only describe a local privilege escalation in .NET by an authorized attacker; they do not name affected versions or configurations. Teams running .NET applications on shared or multi-user machines should look for the advisory details. unknown","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["dotnet","high","runtime"],"campaign_type":null,"search_a":"'-105544':14A,17A '-2026':13A,16A 'access':3A 'control':4A 'cve':12A,15A 'gain':9A 'higher':10A 'improp':2A 'let':5A 'local':7A 'net':1A 'privileg':11A 'user':8A","search_b":"'access':23B 'alreadi':30B 'already-author':29B 'attack':38B 'author':31B 'beyond':52B 'code':42B 'control':24B 'could':49B 'dotnet':18B 'elev':34B 'flaw':25B 'gain':50B 'given':56B 'let':27B 'local':32B 'log':44B 'machin':48B 'net':20B 'privileg':36B 'right':51B 'run':41B 'runtim':19B 'user':33B","search_c":"'access':58C 'allow':62C 'attack':65C 'author':64C 'control':59C 'elev':67C 'improp':57C 'local':69C 'net':61C 'privileg':68C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:17:56+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-105544","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105544","severity":null,"published_at":"2026-11-10T19:17:56+00:00","modified_at":"2026-11-10T19:17:56+00:00","first_seen_at":"2026-11-10T19:24:19+00:00","fetched_at":"2026-11-10T19:24:19+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}