{"id":"CVE-2026-111287","kind":"vulnerability","aliases":["CVE-2026-111287"],"related":[],"title":"Microsoft Word: stack buffer overflow lets an attacker run code remotely","description":"Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.","summary":"A stack-based buffer overflow in Microsoft Office Word lets an unauthenticated attacker run code over a network. Sources give a CVSS score of 7.5 and do not say whether it is exploited in the wild.","severity":"high","cvss":7.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["microsoft-office","vendor","windows","word"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:18:25+00:00","first_seen_at":"2026-11-10T19:24:28+00:00","triaged_at":"2026-11-10T19:47:18+00:00","updated_at":"2026-11-10T19:47:18+00:00","category":"vendor","confidence":0.5,"triage":{"at":"2026-11-10T19:47:18Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft Word: stack buffer overflow lets an attacker run code remotely","impact":"high","summary":"A stack-based buffer overflow in Microsoft Office Word lets an unauthenticated attacker run code over a network. Sources give a CVSS score of 7.5 and do not say whether it is exploited in the wild.","audience":"everyone","category":"vendor","nicknames":[],"who_cares":["microsoft-office","word","windows"],"confidence":0.5,"fix_status":"unknown","needs_auth":"no","worst_case":"Attacker runs code on the victim's computer over the network","analyst_note":"Check the Microsoft Security Update Guide entry for CVE-2026-111287 for affected builds, fixed versions and whether user interaction is needed.","how_to_check":"- unknown","plain_action":"Update Microsoft Word through Microsoft's standard Office updates once Microsoft publishes the fix.","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"People who open Word documents on a computer with Microsoft Office Word installed. The sources do not say which Office builds are affected or whether the file must be opened by the user.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000677,"input_tokens":4494,"output_tokens":455,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Check the Microsoft Security Update Guide entry for CVE-2026-111287 for affected builds, fixed versions and whether user interaction is needed.","search":"'-111287':14A,17A '-2026':13A,16A '7.5':49B 'allow':70C 'attack':8A,37B,73C 'base':27B,63C 'buffer':4A,28B,64C 'code':10A,39B,76C 'cve':12A,15A 'cvss':46B 'execut':75C 'exploit':57B 'give':44B 'let':6A,34B 'microsoft':1A,19B,31B,67C 'microsoft-offic':18B 'network':42B,79C 'offic':20B,32B,68C 'overflow':5A,29B,65C 'remot':11A 'run':9A,38B 'say':53B 'score':47B 'sourc':43B 'stack':3A,26B,62C 'stack-bas':25B,61C 'unauthent':36B 'unauthor':72C 'vendor':21B 'whether':54B 'wild':60B 'window':22B 'word':2A,23B,33B,69C","nicknames":[],"mitigations":[],"who_affected":"People who open Word documents on a computer with Microsoft Office Word installed. The sources do not say which Office builds are affected or whether the file must be opened by the user.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"everyone","plain_action":"Update Microsoft Word through Microsoft's standard Office updates once Microsoft publishes the fix.","pkeys":[],"ptokens":[],"labels":["high","microsoftoffice","vendor","windows","word"],"campaign_type":null,"search_a":"'-111287':14A,17A '-2026':13A,16A 'attack':8A 'buffer':4A 'code':10A 'cve':12A,15A 'let':6A 'microsoft':1A 'overflow':5A 'remot':11A 'run':9A 'stack':3A 'word':2A","search_b":"'7.5':49B 'attack':37B 'base':27B 'buffer':28B 'code':39B 'cvss':46B 'exploit':57B 'give':44B 'let':34B 'microsoft':19B,31B 'microsoft-offic':18B 'network':42B 'offic':20B,32B 'overflow':29B 'run':38B 'say':53B 'score':47B 'sourc':43B 'stack':26B 'stack-bas':25B 'unauthent':36B 'vendor':21B 'whether':54B 'wild':60B 'window':22B 'word':23B,33B","search_c":"'allow':70C 'attack':73C 'base':63C 'buffer':64C 'code':76C 'execut':75C 'microsoft':67C 'network':79C 'offic':68C 'overflow':65C 'stack':62C 'stack-bas':61C 'unauthor':72C 'word':69C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:18:25+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-2026-111287","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111287","severity":null,"published_at":"2026-11-10T19:18:25+00:00","modified_at":"2026-11-10T19:18:25+00:00","first_seen_at":"2026-11-10T19:24:28+00:00","fetched_at":"2026-11-10T19:24:28+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"}