{"id":"CVE-2026-124185","kind":"vulnerability","aliases":["CVE-2026-124185"],"related":[],"title":"Microsoft Word: uninitialized memory use lets a network attacker run code","description":"Use of uninitialized resource in Microsoft Office Word allows an unauthorized attacker to execute code over a network.","summary":"Microsoft Office Word reads a resource it never initialized, which a crafted document or input can exploit. An unauthorized attacker who reaches the victim over a network can run code on the affected machine.","severity":"high","cvss":7.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["microsoft-office","other","windows","word"],"not_affected_if":[],"how_to_check":"- Open Word and check the build under File > Account > About Word, then compare it with Microsoft's security update guide for CVE-2026-124185.","fix":null,"status":"open","published_at":"2026-11-10T19:20:47+00:00","first_seen_at":"2026-11-10T19:25:13+00:00","triaged_at":"2026-11-10T19:43:11+00:00","updated_at":"2026-11-10T19:43:11+00:00","category":"other","confidence":0.4,"triage":{"at":"2026-11-10T19:43:11Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft Word: uninitialized memory use lets a network attacker run code","impact":"high","summary":"Microsoft Office Word reads a resource it never initialized, which a crafted document or input can exploit. An unauthorized attacker who reaches the victim over a network can run code on the affected machine.","audience":"everyone","category":"other","nicknames":[],"who_cares":["microsoft-office","word","windows"],"confidence":0.4,"fix_status":"unknown","needs_auth":"no","worst_case":"attacker runs code on the victim's machine over the network","analyst_note":"Check the Microsoft Security Response Center entry for CVE-2026-124185 for affected builds, the fixed update, and whether opening a file is required.","how_to_check":"- Open Word and check the build under File > Account > About Word, then compare it with Microsoft's security update guide for CVE-2026-124185.\n- unknown","plain_action":"Update Microsoft Word through Microsoft Update once Microsoft publishes a fix for CVE-2026-124185.","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000671,"input_tokens":4492,"output_tokens":443,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Check the Microsoft Security Response Center entry for CVE-2026-124185 for affected builds, the fixed update, and whether opening a file is required.","search":"'-124185':14A,17A '-2026':13A,16A 'affect':56B 'allow':66C 'attack':9A,43B,69C 'code':11A,53B,72C 'craft':35B 'cve':12A,15A 'document':36B 'execut':71C 'exploit':40B 'initi':32B 'input':38B 'let':6A 'machin':57B 'memori':4A 'microsoft':1A,19B,24B,63C 'microsoft-offic':18B 'network':8A,50B,75C 'never':31B 'offic':20B,25B,64C 'reach':45B 'read':27B 'resourc':29B,61C 'run':10A,52B 'unauthor':42B,68C 'uniniti':3A,60C 'use':5A,58C 'victim':47B 'window':22B 'word':2A,23B,26B,65C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"everyone","plain_action":"Update Microsoft Word through Microsoft Update once Microsoft publishes a fix for CVE-2026-124185.","pkeys":[],"ptokens":[],"labels":["high","microsoftoffice","other","windows","word"],"campaign_type":null,"search_a":"'-124185':14A,17A '-2026':13A,16A 'attack':9A 'code':11A 'cve':12A,15A 'let':6A 'memori':4A 'microsoft':1A 'network':8A 'run':10A 'uniniti':3A 'use':5A 'word':2A","search_b":"'affect':56B 'attack':43B 'code':53B 'craft':35B 'document':36B 'exploit':40B 'initi':32B 'input':38B 'machin':57B 'microsoft':19B,24B 'microsoft-offic':18B 'network':50B 'never':31B 'offic':20B,25B 'reach':45B 'read':27B 'resourc':29B 'run':52B 'unauthor':42B 'victim':47B 'window':22B 'word':23B,26B","search_c":"'allow':66C 'attack':69C 'code':72C 'execut':71C 'microsoft':63C 'network':75C 'offic':64C 'resourc':61C 'unauthor':68C 'uniniti':60C 'use':58C 'word':65C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:20:47+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-2026-124185","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124185","severity":null,"published_at":"2026-11-10T19:20:47+00:00","modified_at":"2026-11-10T19:20:47+00:00","first_seen_at":"2026-11-10T19:25:13+00:00","fetched_at":"2026-11-10T19:25:13+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"}