{"id":"CVE-2026-118702","kind":"vulnerability","aliases":["CVE-2026-118702"],"related":[],"title":"Microsoft Excel: double free lets a remote attacker run code","description":"Double free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.","summary":"A memory-handling bug (double free) in Microsoft Office Excel lets an unauthorized attacker over a network run code. 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":[],"ecosystems":[],"tags":["excel","microsoft-office","other","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:19:44+00:00","first_seen_at":"2026-11-10T19:24:52+00:00","triaged_at":"2026-11-10T19:29:48+00:00","updated_at":"2026-11-10T19:29:48+00:00","category":"other","confidence":0.4,"triage":{"at":"2026-11-10T19:29:48Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft Excel: double free lets a remote attacker run code","impact":"high","summary":"A memory-handling bug (double free) in Microsoft Office Excel lets an unauthorized attacker over a network run code. The sources give a CVSS score of 8.8 and no further detail.","audience":"everyone","category":"other","nicknames":[],"who_cares":["microsoft-office","excel","windows"],"confidence":0.4,"fix_status":"unknown","needs_auth":"no","worst_case":"Attacker runs code on the affected machine over the network","analyst_note":"Check the Microsoft Security Response Center entry for CVE-2026-118702 for affected versions, fixed builds and whether user interaction (opening a file) is required.","how_to_check":"- unknown","plain_action":"Update Microsoft Excel through Microsoft's normal update channel once a fix is released.","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Microsoft Office Excel installations. The sources do not say which versions or configurations are affected, or whether a user must open a file.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.00066,"input_tokens":4480,"output_tokens":424,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Check the Microsoft Security Response Center entry for CVE-2026-118702 for affected versions, fixed builds and whether user interaction (opening a file) is required.","search":"'-118702':13A,16A '-2026':12A,15A '8.8':50B 'allow':61C 'attack':8A,37B,64C 'bug':27B 'code':10A,42B,67C 'cve':11A,14A 'cvss':47B 'detail':54B 'doubl':3A,28B,55C 'excel':2A,17B,33B,60C 'execut':66C 'free':4A,29B,56C 'give':45B 'handl':26B 'let':5A,34B 'memori':25B 'memory-handl':24B 'microsoft':1A,19B,31B,58C 'microsoft-offic':18B 'network':40B,70C 'offic':20B,32B,59C 'remot':7A 'run':9A,41B 'score':48B 'sourc':44B 'unauthor':36B,63C 'window':22B","nicknames":[],"mitigations":[],"who_affected":"Microsoft Office Excel installations. The sources do not say which versions or configurations are affected, or whether a user must open a file.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"everyone","plain_action":"Update Microsoft Excel through Microsoft's normal update channel once a fix is released.","pkeys":[],"ptokens":[],"labels":["excel","high","microsoftoffice","other","windows"],"campaign_type":null,"search_a":"'-118702':13A,16A '-2026':12A,15A 'attack':8A 'code':10A 'cve':11A,14A 'doubl':3A 'excel':2A 'free':4A 'let':5A 'microsoft':1A 'remot':7A 'run':9A","search_b":"'8.8':50B 'attack':37B 'bug':27B 'code':42B 'cvss':47B 'detail':54B 'doubl':28B 'excel':17B,33B 'free':29B 'give':45B 'handl':26B 'let':34B 'memori':25B 'memory-handl':24B 'microsoft':19B,31B 'microsoft-offic':18B 'network':40B 'offic':20B,32B 'run':41B 'score':48B 'sourc':44B 'unauthor':36B 'window':22B","search_c":"'allow':61C 'attack':64C 'code':67C 'doubl':55C 'excel':60C 'execut':66C 'free':56C 'microsoft':58C 'network':70C 'offic':59C 'unauthor':63C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:19:44+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-2026-118702","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118702","severity":null,"published_at":"2026-11-10T19:19:44+00:00","modified_at":"2026-11-10T19:19:44+00:00","first_seen_at":"2026-11-10T19:24:52+00:00","fetched_at":"2026-11-10T19:24:52+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"}