{"id":"CVE-2026-119996","kind":"vulnerability","aliases":["CVE-2026-119996"],"related":[],"title":"Microsoft Outlook: heap buffer overflow lets a network attacker run code","description":"Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.","summary":"A heap-based buffer overflow in Microsoft Office Outlook lets an unauthorized attacker trigger memory corruption over a network. The sources say this can lead to code execution on the affected machine.","severity":"high","cvss":7.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["microsoft-office","other","outlook","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":"2026-11-10T19:44:25+00:00","updated_at":"2026-11-10T19:44:25+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-11-10T19:44:25Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft Outlook: heap buffer overflow lets a network attacker run code","impact":"high","summary":"A heap-based buffer overflow in Microsoft Office Outlook lets an unauthorized attacker trigger memory corruption over a network. The sources say this can lead to code execution on the affected machine.","audience":"everyone","category":"other","nicknames":[],"who_cares":["outlook","microsoft-office","windows"],"confidence":0.5,"fix_status":"unknown","needs_auth":"no","worst_case":"Attacker runs code on the affected computer over the network","analyst_note":"Check the Microsoft Security Update Guide entry for CVE-2026-119996 for affected Outlook builds, the patch, and whether a preview pane or message open is required.","how_to_check":"unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000635,"input_tokens":4498,"output_tokens":371,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Check the Microsoft Security Update Guide entry for CVE-2026-119996 for affected Outlook builds, the patch, and whether a preview pane or message open is required.","search":"'-119996':14A,17A '-2026':13A,16A 'affect':55B 'allow':66C 'attack':9A,37B,69C 'base':27B,59C 'buffer':4A,28B,60C 'code':11A,51B,72C 'corrupt':40B 'cve':12A,15A 'execut':52B,71C 'heap':3A,26B,58C 'heap-bas':25B,57C 'lead':49B 'let':6A,34B 'machin':56B 'memori':39B 'microsoft':1A,19B,31B,63C 'microsoft-offic':18B 'network':8A,43B,75C 'offic':20B,32B,64C 'outlook':2A,22B,33B,65C 'overflow':5A,29B,61C 'run':10A 'say':46B 'sourc':45B 'trigger':38B 'unauthor':36B,68C 'window':23B","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"everyone","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","microsoftoffice","other","outlook","windows"],"campaign_type":null,"search_a":"'-119996':14A,17A '-2026':13A,16A 'attack':9A 'buffer':4A 'code':11A 'cve':12A,15A 'heap':3A 'let':6A 'microsoft':1A 'network':8A 'outlook':2A 'overflow':5A 'run':10A","search_b":"'affect':55B 'attack':37B 'base':27B 'buffer':28B 'code':51B 'corrupt':40B 'execut':52B 'heap':26B 'heap-bas':25B 'lead':49B 'let':34B 'machin':56B 'memori':39B 'microsoft':19B,31B 'microsoft-offic':18B 'network':43B 'offic':20B,32B 'outlook':22B,33B 'overflow':29B 'say':46B 'sourc':45B 'trigger':38B 'unauthor':36B 'window':23B","search_c":"'allow':66C 'attack':69C 'base':59C 'buffer':60C 'code':72C 'execut':71C 'heap':58C 'heap-bas':57C 'microsoft':63C 'network':75C 'offic':64C 'outlook':65C 'overflow':61C 'unauthor':68C","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:N/AC:H/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-2026-119996","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119996","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"}