{"id":"CVE-2026-110055","kind":"vulnerability","aliases":["CVE-2026-110055"],"related":[],"title":"Microsoft Word: heap buffer overflow lets a remote attacker run code","description":"Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.","summary":"A heap-based buffer overflow in Microsoft Office Word lets an unauthorized attacker run code over a network. The sources give a CVSS score of 8.8 and no further detail.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["microsoft-office","other","windows","word"],"not_affected_if":[],"how_to_check":"- Check the installed Word version in File > Account > About Word in Microsoft Word","fix":null,"status":"open","published_at":"2026-11-10T19:18:23+00:00","first_seen_at":"2026-11-10T19:24:27+00:00","triaged_at":"2026-11-10T19:32:33+00:00","updated_at":"2026-11-10T19:32:33+00:00","category":"other","confidence":0.4,"triage":{"at":"2026-11-10T19:32:33Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft Word: heap buffer overflow lets a remote attacker run code","impact":"high","summary":"A heap-based buffer overflow in Microsoft Office Word lets an unauthorized attacker run code over a network. The sources give a CVSS score of 8.8 and no further detail.","audience":"businesses","category":"other","nicknames":[],"who_cares":["microsoft-office","word","windows"],"confidence":0.4,"fix_status":"unknown","needs_auth":"unknown","worst_case":"Attacker runs code on the affected machine over the network","analyst_note":"Find the Microsoft Security Update Guide entry for CVE-2026-110055 to confirm affected builds, user interaction and the patch.","how_to_check":"- Check the installed Word version in File > Account > About Word in Microsoft Word\n- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Organizations running Microsoft Office Word are potentially exposed. The sources do not describe the triggering document or configuration, so who can skip it is unknown.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000664,"input_tokens":4494,"output_tokens":429,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find the Microsoft Security Update Guide entry for CVE-2026-110055 to confirm affected builds, user interaction and the patch.","search":"'-110055':14A,17A '-2026':13A,16A '8.8':50B 'allow':64C 'attack':9A,37B,67C 'base':27B,57C 'buffer':4A,28B,58C 'code':11A,39B,70C 'cve':12A,15A 'cvss':47B 'detail':54B 'execut':69C 'give':45B 'heap':3A,26B,56C 'heap-bas':25B,55C 'let':6A,34B 'microsoft':1A,19B,31B,61C 'microsoft-offic':18B 'network':42B,73C 'offic':20B,32B,62C 'overflow':5A,29B,59C 'remot':8A 'run':10A,38B 'score':48B 'sourc':44B 'unauthor':36B,66C 'window':22B 'word':2A,23B,33B,63C","nicknames":[],"mitigations":[],"who_affected":"Organizations running Microsoft Office Word are potentially exposed. The sources do not describe the triggering document or configuration, so who can skip it is unknown.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","microsoftoffice","other","windows","word"],"campaign_type":null,"search_a":"'-110055':14A,17A '-2026':13A,16A 'attack':9A 'buffer':4A 'code':11A 'cve':12A,15A 'heap':3A 'let':6A 'microsoft':1A 'overflow':5A 'remot':8A 'run':10A 'word':2A","search_b":"'8.8':50B 'attack':37B 'base':27B 'buffer':28B 'code':39B 'cvss':47B 'detail':54B 'give':45B 'heap':26B 'heap-bas':25B 'let':34B 'microsoft':19B,31B 'microsoft-offic':18B 'network':42B 'offic':20B,32B 'overflow':29B 'run':38B 'score':48B 'sourc':44B 'unauthor':36B 'window':22B 'word':23B,33B","search_c":"'allow':64C 'attack':67C 'base':57C 'buffer':58C 'code':70C 'execut':69C 'heap':56C 'heap-bas':55C 'microsoft':61C 'network':73C 'offic':62C 'overflow':59C 'unauthor':66C 'word':63C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:18:23+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/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-2026-110055","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-110055","severity":null,"published_at":"2026-11-10T19:18:23+00:00","modified_at":"2026-11-10T19:18:23+00:00","first_seen_at":"2026-11-10T19:24:27+00:00","fetched_at":"2026-11-10T19:24:27+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"}