{"id":"CVE-2026-109498","kind":"vulnerability","aliases":["CVE-2026-109498"],"related":[],"title":"Microsoft Access: heap buffer overflow lets remote attacker run code","description":"Heap-based buffer overflow in Microsoft Office Access allows an unauthorized attacker to execute code over a network.","summary":"A heap-based buffer overflow in Microsoft Office Access lets an unauthorized attacker run code over a network. The sources give no details on the trigger path or the affected Access versions.","severity":"high","cvss":7.5,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Microsoft Office Access","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["access","microsoft-office","other","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:18:18+00:00","first_seen_at":"2026-11-10T19:24:25+00:00","triaged_at":"2026-11-10T19:47:20+00:00","updated_at":"2026-11-10T19:47:20+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-11-10T19:47:20Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft Access: heap buffer overflow lets remote attacker run code","impact":"high","summary":"A heap-based buffer overflow in Microsoft Office Access lets an unauthorized attacker run code over a network. The sources give no details on the trigger path or the affected Access versions.","audience":"businesses","category":"other","nicknames":[],"who_cares":["microsoft-office","access","windows"],"confidence":0.5,"fix_status":"unknown","needs_auth":"unknown","worst_case":"Attacker runs code on the machine over the network","analyst_note":"Check the Microsoft Security Response Center advisory for CVE-2026-109498 for affected Access builds, patched versions and whether user interaction is required.","how_to_check":"unknown","plain_action":"","product_name":"Microsoft Office Access","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":0.00064,"input_tokens":4494,"output_tokens":381,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Check the Microsoft Security Response Center advisory for CVE-2026-109498 for affected Access builds, patched versions and whether user interaction is required.","search":"'-109498':13A,16A '-2026':12A,15A 'access':2A,19A,20B,35B,57B,67C 'affect':56B 'allow':68C 'attack':8A,39B,71C 'base':29B,61C 'buffer':4A,30B,62C 'code':10A,41B,74C 'cve':11A,14A 'detail':49B 'execut':73C 'give':47B 'heap':3A,28B,60C 'heap-bas':27B,59C 'let':6A,36B 'microsoft':1A,17A,22B,33B,65C 'microsoft-offic':21B 'network':44B,77C 'offic':23B,34B,66C 'office':18A 'overflow':5A,31B,63C 'path':53B 'remot':7A 'run':9A,40B 'sourc':46B 'trigger':52B 'unauthor':38B,70C 'version':58B 'window':25B","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":["microsoftofficeaccess","officeaccess"],"ptokens":["access","microsoft","office"],"labels":["access","high","microsoftoffice","other","vendor","windows"],"campaign_type":null,"search_a":"'-109498':13A,16A '-2026':12A,15A 'access':2A,19A 'attack':8A 'buffer':4A 'code':10A 'cve':11A,14A 'heap':3A 'let':6A 'microsoft':1A,17A 'office':18A 'overflow':5A 'remot':7A 'run':9A","search_b":"'access':20B,35B,57B 'affect':56B 'attack':39B 'base':29B 'buffer':30B 'code':41B 'detail':49B 'give':47B 'heap':28B 'heap-bas':27B 'let':36B 'microsoft':22B,33B 'microsoft-offic':21B 'network':44B 'offic':23B,34B 'overflow':31B 'path':53B 'run':40B 'sourc':46B 'trigger':52B 'unauthor':38B 'version':58B 'window':25B","search_c":"'access':67C 'allow':68C 'attack':71C 'base':61C 'buffer':62C 'code':74C 'execut':73C 'heap':60C 'heap-bas':59C 'microsoft':65C 'network':77C 'offic':66C 'overflow':63C 'unauthor':70C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:18:18+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-2026-109498","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109498","severity":null,"published_at":"2026-11-10T19:18:18+00:00","modified_at":"2026-11-10T19:18:18+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"}