{"id":"CVE-2026-112731","kind":"vulnerability","aliases":["CVE-2026-112731"],"related":[],"title":"Microsoft Office: buffer over-read lets a network attacker disclose information","description":"Buffer over-read in Microsoft Office allows an unauthorized attacker to disclose information over a network.","summary":"A memory read past the end of a buffer in Microsoft Office can be triggered over a network. An unauthorized attacker could read information from process memory.","severity":"medium","cvss":6.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["microsoft-office","other"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:18:32+00:00","first_seen_at":"2026-11-10T19:24:31+00:00","triaged_at":"2026-11-10T19:57:59+00:00","updated_at":"2026-11-10T19:57:59+00:00","category":"other","confidence":0.4,"triage":{"at":"2026-11-10T19:57:59Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft Office: buffer over-read lets a network attacker disclose information","impact":"low","summary":"A memory read past the end of a buffer in Microsoft Office can be triggered over a network. An unauthorized attacker could read information from process memory.","audience":"businesses","category":"other","nicknames":[],"who_cares":["microsoft-office"],"confidence":0.4,"fix_status":"unknown","needs_auth":"no","worst_case":"attacker reads some memory contents from the affected Office process","analyst_note":"Check the Microsoft Security Update Guide entry for CVE-2026-112731 for affected builds, the fixed build, and whether user interaction (opening a file) is required.","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":0.000621,"input_tokens":4485,"output_tokens":344,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-112731':15A,18A '-2026':14A,17A 'allow':56C 'attack':10A,42B,59C 'buffer':3A,30B,49C 'could':43B 'cve':13A,16A 'disclos':11A,61C 'end':27B 'inform':12A,45B,62C 'let':7A 'memori':23B,48B 'microsoft':1A,20B,32B,54C 'microsoft-offic':19B 'network':9A,39B,65C 'offic':2A,21B,33B,55C 'over-read':4A,50C 'past':25B 'process':47B 'read':6A,24B,44B,52C 'trigger':36B 'unauthor':41B,58C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["medium","microsoftoffice","other"],"campaign_type":null,"search_a":"'-112731':15A,18A '-2026':14A,17A 'attack':10A 'buffer':3A 'cve':13A,16A 'disclos':11A 'inform':12A 'let':7A 'microsoft':1A 'network':9A 'offic':2A 'over-read':4A 'read':6A","search_b":"'attack':42B 'buffer':30B 'could':43B 'end':27B 'inform':45B 'memori':23B,48B 'microsoft':20B,32B 'microsoft-offic':19B 'network':39B 'offic':21B,33B 'past':25B 'process':47B 'read':24B,44B 'trigger':36B 'unauthor':41B","search_c":"'allow':56C 'attack':59C 'buffer':49C 'disclos':61C 'inform':62C 'microsoft':54C 'network':65C 'offic':55C 'over-read':50C 'read':52C 'unauthor':58C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:18:32+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-2026-112731","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112731","severity":null,"published_at":"2026-11-10T19:18:32+00:00","modified_at":"2026-11-10T19:18:32+00:00","first_seen_at":"2026-11-10T19:24:31+00:00","fetched_at":"2026-11-10T19:24:31+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"}