{"id":"CVE-2026-118708","kind":"vulnerability","aliases":["CVE-2026-118708"],"related":[],"title":"Microsoft Excel: invalid pointer release lets a network attacker run code","description":"Release of invalid pointer or reference in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.","summary":"A memory handling flaw in Microsoft Excel lets an unauthorized attacker run code over a network. The sources do not say what file or action triggers it.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Microsoft Office Excel","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["excel","microsoft-office","other","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:19:46+00:00","first_seen_at":"2026-11-10T19:24:53+00:00","triaged_at":"2026-11-10T19:29:43+00:00","updated_at":"2026-11-10T19:29:43+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-11-10T19:29:43Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft Excel: invalid pointer release lets a network attacker run code","impact":"high","summary":"A memory handling flaw in Microsoft Excel lets an unauthorized attacker run code over a network. The sources do not say what file or action triggers it.","audience":"businesses","category":"other","nicknames":[],"who_cares":["excel","microsoft-office","windows"],"confidence":0.5,"fix_status":"unknown","needs_auth":"no","worst_case":"Attacker runs code on the affected computer over the network.","analyst_note":"Check the Microsoft Security Response Center advisory for CVE-2026-118708 for affected builds, patched versions and whether user interaction (opening a file) is required.","how_to_check":"- unknown","plain_action":"","product_name":"Microsoft Office Excel","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Organizations running Microsoft Office Excel. The sources do not say which Excel versions, file types or configurations are affected, so the exposure cannot be narrowed further.","user_interaction":"unknown","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000665,"input_tokens":4496,"output_tokens":430,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Check the Microsoft Security Response Center advisory for CVE-2026-118708 for affected builds, patched versions and whether user interaction (opening a file) is required.","search":"'-118708':14A,17A '-2026':13A,16A 'action':51B 'allow':63C 'attack':9A,37B,66C 'code':11A,39B,69C 'cve':12A,15A 'excel':2A,20A,21B,33B,62C 'execut':68C 'file':49B 'flaw':30B 'handl':29B 'invalid':3A,55C 'let':6A,34B 'memori':28B 'microsoft':1A,18A,23B,32B,60C 'microsoft-offic':22B 'network':8A,42B,72C 'offic':24B,61C 'office':19A 'pointer':4A,56C 'refer':58C 'releas':5A,53C 'run':10A,38B 'say':47B 'sourc':44B 'trigger':52B 'unauthor':36B,65C 'window':26B","nicknames":[],"mitigations":[],"who_affected":"Organizations running Microsoft Office Excel. The sources do not say which Excel versions, file types or configurations are affected, so the exposure cannot be narrowed further.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":["microsoftofficeexcel","officeexcel"],"ptokens":["excel","microsoft","office"],"labels":["excel","high","microsoftoffice","other","vendor","windows"],"campaign_type":null,"search_a":"'-118708':14A,17A '-2026':13A,16A 'attack':9A 'code':11A 'cve':12A,15A 'excel':2A,20A 'invalid':3A 'let':6A 'microsoft':1A,18A 'network':8A 'office':19A 'pointer':4A 'releas':5A 'run':10A","search_b":"'action':51B 'attack':37B 'code':39B 'excel':21B,33B 'file':49B 'flaw':30B 'handl':29B 'let':34B 'memori':28B 'microsoft':23B,32B 'microsoft-offic':22B 'network':42B 'offic':24B 'run':38B 'say':47B 'sourc':44B 'trigger':52B 'unauthor':36B 'window':26B","search_c":"'allow':63C 'attack':66C 'code':69C 'excel':62C 'execut':68C 'invalid':55C 'microsoft':60C 'network':72C 'offic':61C 'pointer':56C 'refer':58C 'releas':53C 'unauthor':65C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:19:46+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-2026-118708","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118708","severity":null,"published_at":"2026-11-10T19:19:46+00:00","modified_at":"2026-11-10T19:19:46+00:00","first_seen_at":"2026-11-10T19:24:53+00:00","fetched_at":"2026-11-10T19:24:53+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"}