{"id":"CVE-2026-119997","kind":"vulnerability","aliases":["CVE-2026-119997"],"related":[],"title":"Microsoft Outlook: heap buffer overflow lets a local attacker run code","description":"Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code locally.","summary":"A heap-based buffer overflow in Microsoft Office Outlook lets an unauthorized attacker run code on the local machine. The sources do not describe the trigger file or action.","severity":"high","cvss":7.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["microsoft-office","outlook","package","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:20:25+00:00","first_seen_at":"2026-11-10T19:25:07+00:00","triaged_at":"2026-11-10T19:40:05+00:00","updated_at":"2026-11-10T19:40:05+00:00","category":"package","confidence":0.4,"triage":{"at":"2026-11-10T19:40:05Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Microsoft Outlook: heap buffer overflow lets a local attacker run code","impact":"high","summary":"A heap-based buffer overflow in Microsoft Office Outlook lets an unauthorized attacker run code on the local machine. The sources do not describe the trigger file or action.","audience":"everyone","category":"package","nicknames":[],"who_cares":["outlook","windows","microsoft-office"],"confidence":0.4,"fix_status":"unknown","needs_auth":"unknown","worst_case":"Attacker runs code on the local machine through Outlook","analyst_note":"Check the NVD entry and Microsoft's security update guide for affected Outlook builds, the fixed versions, and whether user interaction is required.","how_to_check":"- unknown","plain_action":"Update Microsoft Outlook through Microsoft Update once Microsoft releases a fix for this flaw.","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Machines with Microsoft Office Outlook installed are potentially exposed. The sources do not say which Outlook versions or configurations are affected, or what user action is needed.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000671,"input_tokens":4496,"output_tokens":442,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Check the NVD entry and Microsoft's security update guide for affected Outlook builds, the fixed versions, and whether user interaction is required.","search":"'-119997':14A,17A '-2026':13A,16A 'action':53B 'allow':63C 'attack':9A,37B,66C 'base':27B,56C 'buffer':4A,28B,57C 'code':11A,39B,69C 'cve':12A,15A 'describ':48B 'execut':68C 'file':51B 'heap':3A,26B,55C 'heap-bas':25B,54C 'let':6A,34B 'local':8A,42B,70C 'machin':43B 'microsoft':1A,19B,31B,60C 'microsoft-offic':18B 'offic':20B,32B,61C 'outlook':2A,21B,33B,62C 'overflow':5A,29B,58C 'packag':22B 'run':10A,38B 'sourc':45B 'trigger':50B 'unauthor':36B,65C 'window':23B","nicknames":[],"mitigations":[],"who_affected":"Machines with Microsoft Office Outlook installed are potentially exposed. The sources do not say which Outlook versions or configurations are affected, or what user action is needed.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"everyone","plain_action":"Update Microsoft Outlook through Microsoft Update once Microsoft releases a fix for this flaw.","pkeys":[],"ptokens":[],"labels":["high","microsoftoffice","outlook","package","windows"],"campaign_type":null,"search_a":"'-119997':14A,17A '-2026':13A,16A 'attack':9A 'buffer':4A 'code':11A 'cve':12A,15A 'heap':3A 'let':6A 'local':8A 'microsoft':1A 'outlook':2A 'overflow':5A 'run':10A","search_b":"'action':53B 'attack':37B 'base':27B 'buffer':28B 'code':39B 'describ':48B 'file':51B 'heap':26B 'heap-bas':25B 'let':34B 'local':42B 'machin':43B 'microsoft':19B,31B 'microsoft-offic':18B 'offic':20B,32B 'outlook':21B,33B 'overflow':29B 'packag':22B 'run':38B 'sourc':45B 'trigger':50B 'unauthor':36B 'window':23B","search_c":"'allow':63C 'attack':66C 'base':56C 'buffer':57C 'code':69C 'execut':68C 'heap':55C 'heap-bas':54C 'local':70C 'microsoft':60C 'offic':61C 'outlook':62C 'overflow':58C 'unauthor':65C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:20:25+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-119997","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119997","severity":null,"published_at":"2026-11-10T19:20:25+00:00","modified_at":"2026-11-10T19:20:25+00:00","first_seen_at":"2026-11-10T19:25:07+00:00","fetched_at":"2026-11-10T19:25:07+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"}