{"id":"CVE-2026-119999","kind":"vulnerability","aliases":["CVE-2026-119999"],"related":[],"title":"Microsoft Excel: out-of-bounds read lets a remote attacker leak information","description":"Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.","summary":"A memory out-of-bounds read in Microsoft Office Excel lets an unauthorized attacker read data over a network. The sources describe information disclosure only, not code execution.","severity":"medium","cvss":6.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["excel","microsoft-office","other","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":"2026-11-10T19:56:20+00:00","updated_at":"2026-11-10T19:56:20+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-11-10T19:56:20Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft Excel: out-of-bounds read lets a remote attacker leak information","impact":"low","summary":"A memory out-of-bounds read in Microsoft Office Excel lets an unauthorized attacker read data over a network. The sources describe information disclosure only, not code execution.","audience":"businesses","category":"other","nicknames":[],"who_cares":["excel","microsoft-office","windows"],"confidence":0.5,"fix_status":"unknown","needs_auth":"unknown","worst_case":"attacker reads some memory contents from Excel","analyst_note":"Check the Microsoft Security Response Center advisory for CVE-2026-119999 for affected Office builds, patch and user-interaction requirements.","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":"medium"},"cost_usd":0.000626,"input_tokens":4495,"output_tokens":353,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-119999':16A,19A '-2026':15A,18A 'allow':64C 'attack':11A,40B,67C 'bound':6A,31B,58C 'code':53B 'cve':14A,17A 'data':42B 'describ':48B 'disclos':69C 'disclosur':50B 'excel':2A,20B,36B,63C 'execut':54B 'inform':13A,49B,70C 'leak':12A 'let':8A,37B 'memori':27B 'microsoft':1A,22B,34B,61C 'microsoft-offic':21B 'network':45B,73C 'offic':23B,35B,62C 'out-of-bound':3A,28B,55C 'read':7A,32B,41B,59C 'remot':10A 'sourc':47B 'unauthor':39B,66C 'window':25B","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["excel","medium","microsoftoffice","other","windows"],"campaign_type":null,"search_a":"'-119999':16A,19A '-2026':15A,18A 'attack':11A 'bound':6A 'cve':14A,17A 'excel':2A 'inform':13A 'leak':12A 'let':8A 'microsoft':1A 'out-of-bound':3A 'read':7A 'remot':10A","search_b":"'attack':40B 'bound':31B 'code':53B 'data':42B 'describ':48B 'disclosur':50B 'excel':20B,36B 'execut':54B 'inform':49B 'let':37B 'memori':27B 'microsoft':22B,34B 'microsoft-offic':21B 'network':45B 'offic':23B,35B 'out-of-bound':28B 'read':32B,41B 'sourc':47B 'unauthor':39B 'window':25B","search_c":"'allow':64C 'attack':67C 'bound':58C 'disclos':69C 'excel':63C 'inform':70C 'microsoft':61C 'network':73C 'offic':62C 'out-of-bound':55C 'read':59C 'unauthor':66C","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:L/PR:N/UI:R/S:U/C:H/I:N/A:N","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-119999","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119999","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"}