{"id":"CVE-2026-113759","kind":"vulnerability","aliases":["CVE-2026-113759"],"related":[],"title":"Microsoft Office Word: use-after-free lets a local attacker run code","description":"Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.","summary":"Microsoft Word mishandles memory after it is freed, a use-after-free bug. A local attacker with no account can use it to execute code on the machine running Word.","severity":"high","cvss":7.8,"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":["unknown"],"how_to_check":"- Open Word and check the version under File > Account > About Word, then compare it with Microsoft's security update notes.","fix":null,"status":"open","published_at":"2026-11-10T19:18:54+00:00","first_seen_at":"2026-11-10T19:24:38+00:00","triaged_at":"2026-11-10T19:41:01+00:00","updated_at":"2026-11-10T19:41:01+00:00","category":"package","confidence":0.4,"triage":{"at":"2026-11-10T19:41:01Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Microsoft Office Word: use-after-free lets a local attacker run code","impact":"high","summary":"Microsoft Word mishandles memory after it is freed, a use-after-free bug. A local attacker with no account can use it to execute code on the machine running Word.","audience":"everyone","category":"package","nicknames":[],"who_cares":["microsoft-office","word","windows"],"confidence":0.4,"fix_status":"unknown","needs_auth":"no","worst_case":"Attacker runs arbitrary code on the local machine","analyst_note":"Confirm affected Word builds and the Microsoft security update that fixes CVE-2026-113759, and whether user interaction such as opening a document is required.","how_to_check":"- Open Word and check the version under File > Account > About Word, then compare it with Microsoft's security update notes.\n- unknown","plain_action":"Update Microsoft Word through Microsoft Update so it is on the latest patched version.","product_name":"Microsoft Office Word","needs_analyst":true,"not_affected_if":["unknown"],"who_is_affected":"Anyone running an affected version of Microsoft Office Word on a local machine. The sources do not give the affected version ranges or whether a user must open a file to trigger it.","user_interaction":"unknown","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000694,"input_tokens":4478,"output_tokens":492,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Confirm affected Word builds and the Microsoft security update that fixes CVE-2026-113759, and whether user interaction such as opening a document is required.","search":"'-113759':16A,19A '-2026':15A,18A 'account':48B 'allow':67C 'attack':11A,45B,70C 'bug':42B 'code':13A,54B,73C 'cve':14A,17A 'execut':53B,72C 'free':7A,41B,62C 'freed':36B 'let':8A 'local':10A,44B,74C 'machin':57B 'memori':32B 'microsoft':1A,20A,24B,29B,64C 'microsoft-offic':23B 'mishandl':31B 'offic':2A,25B,65C 'office':21A 'packag':26B 'run':12A,58B 'unauthor':69C 'use':5A,39B,50B,60C 'use-after-fre':4A,38B 'window':27B 'word':3A,22A,28B,30B,59B,66C","nicknames":[],"mitigations":[],"who_affected":"Anyone running an affected version of Microsoft Office Word on a local machine. The sources do not give the affected version ranges or whether a user must open a file to trigger it.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"everyone","plain_action":"Update Microsoft Word through Microsoft Update so it is on the latest patched version.","pkeys":["microsoftofficeword","officeword"],"ptokens":["microsoft","office","word"],"labels":["high","microsoftoffice","package","vendor","windows","word"],"campaign_type":null,"search_a":"'-113759':16A,19A '-2026':15A,18A 'attack':11A 'code':13A 'cve':14A,17A 'free':7A 'let':8A 'local':10A 'microsoft':1A,20A 'offic':2A 'office':21A 'run':12A 'use':5A 'use-after-fre':4A 'word':3A,22A","search_b":"'account':48B 'attack':45B 'bug':42B 'code':54B 'execut':53B 'free':41B 'freed':36B 'local':44B 'machin':57B 'memori':32B 'microsoft':24B,29B 'microsoft-offic':23B 'mishandl':31B 'offic':25B 'packag':26B 'run':58B 'use':39B,50B 'use-after-fre':38B 'window':27B 'word':28B,30B,59B","search_c":"'allow':67C 'attack':70C 'code':73C 'execut':72C 'free':62C 'local':74C 'microsoft':64C 'offic':65C 'unauthor':69C 'use':60C 'word':66C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:18:54+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/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-2026-113759","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113759","severity":null,"published_at":"2026-11-10T19:18:54+00:00","modified_at":"2026-11-10T19:18:54+00:00","first_seen_at":"2026-11-10T19:24:38+00:00","fetched_at":"2026-11-10T19:24:38+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"}