{"id":"CVE-2026-111304","kind":"vulnerability","aliases":["CVE-2026-111304"],"related":[],"title":"Microsoft Word: use-after-free lets a remote attacker run code","description":"Use after free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.","summary":"A use-after-free bug in Microsoft Office Word lets an unauthorized attacker run code over a network. The sources give no further detail on how the document or connection is used to trigger it.","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","package","windows","word"],"not_affected_if":[],"how_to_check":"- Open Word and check the version under File > Account (or Help > About) and compare it with the fixed build in Microsoft's advisory for CVE-2026-111304","fix":null,"status":"open","published_at":"2026-11-10T19:18:28+00:00","first_seen_at":"2026-11-10T19:24:29+00:00","triaged_at":"2026-11-10T19:32:17+00:00","updated_at":"2026-11-10T19:32:17+00:00","category":"package","confidence":0.5,"triage":{"at":"2026-11-10T19:32:17Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft Word: use-after-free lets a remote attacker run code","impact":"high","summary":"A use-after-free bug in Microsoft Office Word lets an unauthorized attacker run code over a network. The sources give no further detail on how the document or connection is used to trigger it.","audience":"everyone","category":"package","nicknames":[],"who_cares":["microsoft-office","word","windows"],"confidence":0.5,"fix_status":"unknown","needs_auth":"unknown","worst_case":"attacker runs code on the victim's computer over the network","analyst_note":"Confirm affected Word builds, the fixed build numbers and whether user interaction is required, from the Microsoft Security Response Center advisory for CVE-2026-111304 and NVD.","how_to_check":"- Open Word and check the version under File > Account (or Help > About) and compare it with the fixed build in Microsoft's advisory for CVE-2026-111304\n- unknown beyond that, as the sources do not say which builds are affected","plain_action":"Update Microsoft Word through Microsoft Update so it includes the fix for CVE-2026-111304.","product_name":"Microsoft Office Word","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown. The sources describe a network-reachable code execution flaw in Microsoft Office Word but do not list affected versions, required user actions, or whether a preview pane or opened file is enough to trigger it.","user_interaction":"unknown","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000728,"input_tokens":4480,"output_tokens":561,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Confirm affected Word builds, the fixed build numbers and whether user interaction is required, from the Microsoft Security Response Center advisory for CVE-2026-111304 and NVD.","search":"'-111304':15A,18A '-2026':14A,17A 'allow':70C 'attack':10A,41B,73C 'bug':33B 'code':12A,43B,76C 'connect':58B 'cve':13A,16A 'detail':52B 'document':56B 'execut':75C 'free':6A,32B,65C 'give':49B 'let':7A,38B 'microsoft':1A,19A,23B,35B,67C 'microsoft-offic':22B 'network':46B,79C 'offic':24B,36B,68C 'office':20A 'packag':25B 'remot':9A 'run':11A,42B 'sourc':48B 'trigger':62B 'unauthor':40B,72C 'use':4A,30B,60B,63C 'use-after-fre':3A,29B 'window':26B 'word':2A,21A,27B,37B,69C","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 so it includes the fix for CVE-2026-111304.","pkeys":["microsoftofficeword","officeword"],"ptokens":["microsoft","office","word"],"labels":["high","microsoftoffice","package","vendor","windows","word"],"campaign_type":null,"search_a":"'-111304':15A,18A '-2026':14A,17A 'attack':10A 'code':12A 'cve':13A,16A 'free':6A 'let':7A 'microsoft':1A,19A 'office':20A 'remot':9A 'run':11A 'use':4A 'use-after-fre':3A 'word':2A,21A","search_b":"'attack':41B 'bug':33B 'code':43B 'connect':58B 'detail':52B 'document':56B 'free':32B 'give':49B 'let':38B 'microsoft':23B,35B 'microsoft-offic':22B 'network':46B 'offic':24B,36B 'packag':25B 'run':42B 'sourc':48B 'trigger':62B 'unauthor':40B 'use':30B,60B 'use-after-fre':29B 'window':26B 'word':27B,37B","search_c":"'allow':70C 'attack':73C 'code':76C 'execut':75C 'free':65C 'microsoft':67C 'network':79C 'offic':68C 'unauthor':72C 'use':63C 'word':69C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:18:28+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-2026-111304","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111304","severity":null,"published_at":"2026-11-10T19:18:28+00:00","modified_at":"2026-11-10T19:18:28+00:00","first_seen_at":"2026-11-10T19:24:29+00:00","fetched_at":"2026-11-10T19:24:29+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"}