{"id":"CVE-2026-111289","kind":"vulnerability","aliases":["CVE-2026-111289"],"related":[],"title":"Microsoft Office: use-after-free lets a network attacker run code","description":"Use after free in Microsoft Office allows an unauthorized attacker to execute code over a network.","summary":"A use-after-free bug in Microsoft Office lets an unauthorized attacker run code on a victim's machine over a network. The sources give a CVSS score of 8.8 and no further detail.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Microsoft Office","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["microsoft-office","package","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:18:26+00:00","first_seen_at":"2026-11-10T19:24:28+00:00","triaged_at":"2026-11-10T19:32:22+00:00","updated_at":"2026-11-10T19:32:22+00:00","category":"package","confidence":0.5,"triage":{"at":"2026-11-10T19:32:22Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft Office: use-after-free lets a network attacker run code","impact":"high","summary":"A use-after-free bug in Microsoft Office lets an unauthorized attacker run code on a victim's machine over a network. The sources give a CVSS score of 8.8 and no further detail.","audience":"everyone","category":"package","nicknames":[],"who_cares":["microsoft-office","windows"],"confidence":0.5,"fix_status":"unknown","needs_auth":"no","worst_case":"Attacker runs code on the victim's machine over the network.","analyst_note":"Confirm the affected Office builds and the vendor fix in the Microsoft Security Update Guide entry for CVE-2026-111289, and whether user interaction (opening a file) is required.","how_to_check":"unknown","plain_action":"","product_name":"Microsoft Office","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"unknown","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000643,"input_tokens":4476,"output_tokens":390,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Confirm the affected Office builds and the vendor fix in the Microsoft Security Update Guide entry for CVE-2026-111289, and whether user interaction (opening a file) is required.","search":"'-111289':15A,18A '-2026':14A,17A '8.8':56B 'allow':67C 'attack':10A,38B,70C 'bug':31B 'code':12A,40B,73C 'cve':13A,16A 'cvss':53B 'detail':60B 'execut':72C 'free':6A,30B,63C 'give':51B 'let':7A,35B 'machin':45B 'microsoft':1A,19A,22B,33B,65C 'microsoft-offic':21B 'network':9A,48B,76C 'offic':2A,23B,34B,66C 'office':20A 'packag':24B 'run':11A,39B 'score':54B 'sourc':50B 'unauthor':37B,69C 'use':4A,28B,61C 'use-after-fre':3A,27B 'victim':43B 'window':25B","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"everyone","plain_action":null,"pkeys":["microsoftoffice","office"],"ptokens":["microsoft","office"],"labels":["high","microsoftoffice","package","vendor","windows"],"campaign_type":null,"search_a":"'-111289':15A,18A '-2026':14A,17A 'attack':10A 'code':12A 'cve':13A,16A 'free':6A 'let':7A 'microsoft':1A,19A 'network':9A 'offic':2A 'office':20A 'run':11A 'use':4A 'use-after-fre':3A","search_b":"'8.8':56B 'attack':38B 'bug':31B 'code':40B 'cvss':53B 'detail':60B 'free':30B 'give':51B 'let':35B 'machin':45B 'microsoft':22B,33B 'microsoft-offic':21B 'network':48B 'offic':23B,34B 'packag':24B 'run':39B 'score':54B 'sourc':50B 'unauthor':37B 'use':28B 'use-after-fre':27B 'victim':43B 'window':25B","search_c":"'allow':67C 'attack':70C 'code':73C 'execut':72C 'free':63C 'microsoft':65C 'network':76C 'offic':66C 'unauthor':69C 'use':61C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:18:26+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-2026-111289","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111289","severity":null,"published_at":"2026-11-10T19:18:26+00:00","modified_at":"2026-11-10T19:18:26+00:00","first_seen_at":"2026-11-10T19:24:28+00:00","fetched_at":"2026-11-10T19:24:28+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"}