{"id":"CVE-2026-109501","kind":"vulnerability","aliases":["CVE-2026-109501"],"related":[],"title":"Microsoft Word: out-of-bounds read lets a remote attacker run code","description":"Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to execute code over a network.","summary":"A memory read past the end of a buffer in Microsoft Office Word can be triggered over a network. The sources say an unauthorized attacker can use it to execute code.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Microsoft Office Word","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["microsoft-office","microsoft-word","other","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:18:19+00:00","first_seen_at":"2026-11-10T19:24:25+00:00","triaged_at":"2026-11-10T19:33:52+00:00","updated_at":"2026-11-10T19:33:52+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-11-10T19:33:52Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft Word: out-of-bounds read lets a remote attacker run code","impact":"high","summary":"A memory read past the end of a buffer in Microsoft Office Word can be triggered over a network. The sources say an unauthorized attacker can use it to execute code.","audience":"everyone","category":"other","nicknames":[],"who_cares":["microsoft-word","microsoft-office","windows"],"confidence":0.5,"fix_status":"unknown","needs_auth":"no","worst_case":"Attacker runs code on the machine over the network","analyst_note":"Confirm affected Word versions, the patch from Microsoft's security update guide, and whether user interaction (opening a document or preview) is required; NVD entry lists no products.","how_to_check":"- unknown","plain_action":"","product_name":"Microsoft Office Word","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"unknown","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000641,"input_tokens":4490,"output_tokens":384,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Confirm affected Word versions, the patch from Microsoft's security update guide, and whether user interaction (opening a document or preview) is required; NVD entry lists no products.","search":"'-109501':16A,19A '-2026':15A,18A 'allow':71C 'attack':11A,55B,74C 'bound':6A,65C 'buffer':39B 'code':13A,61B,77C 'cve':14A,17A 'end':36B 'execut':60B,76C 'let':8A 'memori':32B 'microsoft':1A,20A,24B,27B,41B,68C 'microsoft-offic':23B 'microsoft-word':26B 'network':49B,80C 'offic':25B,42B,69C 'office':21A 'out-of-bound':3A,62C 'past':34B 'read':7A,33B,66C 'remot':10A 'run':12A 'say':52B 'sourc':51B 'trigger':46B 'unauthor':54B,73C 'use':57B 'window':30B 'word':2A,22A,28B,43B,70C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"everyone","plain_action":null,"pkeys":["microsoftofficeword","officeword"],"ptokens":["microsoft","office","word"],"labels":["high","microsoftoffice","microsoftword","other","vendor","windows"],"campaign_type":null,"search_a":"'-109501':16A,19A '-2026':15A,18A 'attack':11A 'bound':6A 'code':13A 'cve':14A,17A 'let':8A 'microsoft':1A,20A 'office':21A 'out-of-bound':3A 'read':7A 'remot':10A 'run':12A 'word':2A,22A","search_b":"'attack':55B 'buffer':39B 'code':61B 'end':36B 'execut':60B 'memori':32B 'microsoft':24B,27B,41B 'microsoft-offic':23B 'microsoft-word':26B 'network':49B 'offic':25B,42B 'past':34B 'read':33B 'say':52B 'sourc':51B 'trigger':46B 'unauthor':54B 'use':57B 'window':30B 'word':28B,43B","search_c":"'allow':71C 'attack':74C 'bound':65C 'code':77C 'execut':76C 'microsoft':68C 'network':80C 'offic':69C 'out-of-bound':62C 'read':66C 'unauthor':73C 'word':70C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:18:19+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-2026-109501","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109501","severity":null,"published_at":"2026-11-10T19:18:19+00:00","modified_at":"2026-11-10T19:18:19+00:00","first_seen_at":"2026-11-10T19:24:25+00:00","fetched_at":"2026-11-10T19:24:25+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"}