{"id":"CVE-2026-119390","kind":"vulnerability","aliases":["CVE-2026-119390"],"related":[],"title":"Windows Remote Desktop Client: heap overflow lets a local user run code","description":"Heap-based buffer overflow in Remote Desktop Client allows an authorized attacker to execute code locally.","summary":"A heap-based buffer overflow in the Remote Desktop Client lets an authorized local attacker execute code. The sources give no affected versions or fix.","severity":"high","cvss":7.8,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Remote Desktop Client","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["infrastructure","remote-desktop","windows"],"not_affected_if":["no-remote-desktop-client"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:19:53+00:00","first_seen_at":"2026-11-10T19:24:56+00:00","triaged_at":"2026-11-10T19:40:33+00:00","updated_at":"2026-11-10T19:40:33+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T19:40:33Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows Remote Desktop Client: heap overflow lets a local user run code","impact":"high","summary":"A heap-based buffer overflow in the Remote Desktop Client lets an authorized local attacker execute code. The sources give no affected versions or fix.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","remote-desktop"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"local attacker runs code with the client's privileges","analyst_note":"Find the affected versions and Microsoft's fix in the MSRC advisory for CVE-2026-119390; the NVD entry alone gives neither.","how_to_check":"unknown","plain_action":"","product_name":"Remote Desktop Client","needs_analyst":true,"not_affected_if":["no-remote-desktop-client"],"who_is_affected":"Machines running the Remote Desktop Client are the systems to look at, and only a user already authorized on that machine can trigger the flaw. The sources do not name affected versions or configurations, so the scope beyond that is unknown.","user_interaction":"unknown","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000674,"input_tokens":4488,"output_tokens":450,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find the affected versions and Microsoft's fix in the MSRC advisory for CVE-2026-119390; the NVD entry alone gives neither.","search":"'-119390':15A,18A '-2026':14A,17A 'affect':49B 'allow':62C 'attack':42B,65C 'author':40B,64C 'base':30B,55C 'buffer':31B,56C 'client':4A,21A,37B,61C 'code':12A,44B,68C 'cve':13A,16A 'desktop':3A,20A,25B,36B,60C 'execut':43B,67C 'fix':52B 'give':47B 'heap':5A,29B,54C 'heap-bas':28B,53C 'infrastructur':22B 'let':7A,38B 'local':9A,41B,69C 'overflow':6A,32B,57C 'remot':2A,24B,35B,59C 'remote':19A 'remote-desktop':23B 'run':11A 'sourc':46B 'user':10A 'version':50B 'window':1A,26B","nicknames":[],"mitigations":[],"who_affected":"Machines running the Remote Desktop Client are the systems to look at, and only a user already authorized on that machine can trigger the flaw. The sources do not name affected versions or configurations, so the scope beyond that is unknown.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":["desktopclient","remotedesktopclient"],"ptokens":["client","desktop","remote"],"labels":["high","infrastructure","remotedesktop","vendor","windows"],"campaign_type":null,"search_a":"'-119390':15A,18A '-2026':14A,17A 'client':4A,21A 'code':12A 'cve':13A,16A 'desktop':3A,20A 'heap':5A 'let':7A 'local':9A 'overflow':6A 'remot':2A 'remote':19A 'run':11A 'user':10A 'window':1A","search_b":"'affect':49B 'attack':42B 'author':40B 'base':30B 'buffer':31B 'client':37B 'code':44B 'desktop':25B,36B 'execut':43B 'fix':52B 'give':47B 'heap':29B 'heap-bas':28B 'infrastructur':22B 'let':38B 'local':41B 'overflow':32B 'remot':24B,35B 'remote-desktop':23B 'sourc':46B 'version':50B 'window':26B","search_c":"'allow':62C 'attack':65C 'author':64C 'base':55C 'buffer':56C 'client':61C 'code':68C 'desktop':60C 'execut':67C 'heap':54C 'heap-bas':53C 'local':69C 'overflow':57C 'remot':59C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:19:53+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/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-2026-119390","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119390","severity":null,"published_at":"2026-11-10T19:19:53+00:00","modified_at":"2026-11-10T19:19:53+00:00","first_seen_at":"2026-11-10T19:24:56+00:00","fetched_at":"2026-11-10T19:24:56+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"}