{"id":"CVE-2026-105554","kind":"vulnerability","aliases":["CVE-2026-105554"],"related":[],"title":"Windows BITS: heap overflow lets a local user gain higher privileges","description":"Heap-based buffer overflow in Windows Background Intelligent Transfer Service (BITS) allows an authorized attacker to elevate privileges locally.","summary":"Windows Background Intelligent Transfer Service has a heap-based buffer overflow. An attacker who already has an authorized local account can use it to elevate privileges on the machine.","severity":"high","cvss":7.0,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["bits","infrastructure","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:17:57+00:00","first_seen_at":"2026-11-10T19:24:19+00:00","triaged_at":"2026-11-10T19:54:02+00:00","updated_at":"2026-11-10T19:54:02+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-11-10T19:54:02Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows BITS: heap overflow lets a local user gain higher privileges","impact":"high","summary":"Windows Background Intelligent Transfer Service has a heap-based buffer overflow. An attacker who already has an authorized local account can use it to elevate privileges on the machine.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","bits"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user gains SYSTEM-level privileges on the machine","analyst_note":"Confirm affected Windows builds and the Microsoft security update from the MSRC advisory for CVE-2026-105554.","how_to_check":"- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Machines running Windows with the Background Intelligent Transfer Service enabled, where a local user with an account could try to escalate. The sources do not say which Windows versions are affected or whether a default configuration is exposed.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000655,"input_tokens":4510,"output_tokens":408,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Confirm affected Windows builds and the Microsoft security update from the MSRC advisory for CVE-2026-105554.","search":"'-105554':14A,17A '-2026':13A,16A 'account':41B 'allow':63C 'alreadi':36B 'attack':34B,66C 'author':39B,65C 'background':22B,58C 'base':30B,53C 'bit':2A,18B,62C 'buffer':31B,54C 'cve':12A,15A 'elev':46B,68C 'gain':9A 'heap':3A,29B,52C 'heap-bas':28B,51C 'higher':10A 'infrastructur':19B 'intellig':23B,59C 'let':5A 'local':7A,40B,70C 'machin':50B 'overflow':4A,32B,55C 'privileg':11A,47B,69C 'servic':25B,61C 'transfer':24B,60C 'use':43B 'user':8A 'window':1A,20B,21B,57C","nicknames":[],"mitigations":[],"who_affected":"Machines running Windows with the Background Intelligent Transfer Service enabled, where a local user with an account could try to escalate. The sources do not say which Windows versions are affected or whether a default configuration is exposed.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["bits","high","infrastructure","windows"],"campaign_type":null,"search_a":"'-105554':14A,17A '-2026':13A,16A 'bit':2A 'cve':12A,15A 'gain':9A 'heap':3A 'higher':10A 'let':5A 'local':7A 'overflow':4A 'privileg':11A 'user':8A 'window':1A","search_b":"'account':41B 'alreadi':36B 'attack':34B 'author':39B 'background':22B 'base':30B 'bit':18B 'buffer':31B 'elev':46B 'heap':29B 'heap-bas':28B 'infrastructur':19B 'intellig':23B 'local':40B 'machin':50B 'overflow':32B 'privileg':47B 'servic':25B 'transfer':24B 'use':43B 'window':20B,21B","search_c":"'allow':63C 'attack':66C 'author':65C 'background':58C 'base':53C 'bit':62C 'buffer':54C 'elev':68C 'heap':52C 'heap-bas':51C 'intellig':59C 'local':70C 'overflow':55C 'privileg':69C 'servic':61C 'transfer':60C 'window':57C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:17:57+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-105554","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105554","severity":null,"published_at":"2026-11-10T19:17:57+00:00","modified_at":"2026-11-10T19:17:57+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"}