{"id":"CVE-2026-110043","kind":"vulnerability","aliases":["CVE-2026-110043"],"related":[],"title":"Microsoft Outlook: heap overflow lets a remote attacker run code","description":"Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.","summary":"A heap-based buffer overflow in Microsoft Office Outlook lets an unauthorized attacker reach code execution over a network. The sources give no further detail on the trigger path or affected versions.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["microsoft-office","outlook","vendor","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:18:20+00:00","first_seen_at":"2026-11-10T19:24:26+00:00","triaged_at":"2026-11-10T19:32:37+00:00","updated_at":"2026-11-10T19:32:37+00:00","category":"vendor","confidence":0.5,"triage":{"at":"2026-11-10T19:32:37Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft Outlook: heap overflow lets a remote attacker run code","impact":"high","summary":"A heap-based buffer overflow in Microsoft Office Outlook lets an unauthorized attacker reach code execution over a network. The sources give no further detail on the trigger path or affected versions.","audience":"everyone","category":"vendor","nicknames":[],"who_cares":["outlook","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":"Check the Microsoft Security Update Guide entry for CVE-2026-110043 for affected builds, required user interaction and the patch.","how_to_check":"unknown","plain_action":"Update Microsoft Outlook through Windows or Office update once Microsoft publishes a fix; the sources do not state a fixed version.","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Organizations and people running Microsoft Office Outlook; the sources do not name affected versions or configurations. unknown","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000667,"input_tokens":4498,"output_tokens":434,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Check the Microsoft Security Update Guide entry for CVE-2026-110043 for affected builds, required user interaction and the patch.","search":"'-110043':13A,16A '-2026':12A,15A 'affect':54B 'allow':65C 'attack':8A,36B,68C 'base':26B,58C 'buffer':27B,59C 'code':10A,38B,71C 'cve':11A,14A 'detail':48B 'execut':39B,70C 'give':45B 'heap':3A,25B,57C 'heap-bas':24B,56C 'let':5A,33B 'microsoft':1A,18B,30B,62C 'microsoft-offic':17B 'network':42B,74C 'offic':19B,31B,63C 'outlook':2A,20B,32B,64C 'overflow':4A,28B,60C 'path':52B 'reach':37B 'remot':7A 'run':9A 'sourc':44B 'trigger':51B 'unauthor':35B,67C 'vendor':21B 'version':55B 'window':22B","nicknames":[],"mitigations":[],"who_affected":"Organizations and people running Microsoft Office Outlook; the sources do not name affected versions or configurations. unknown","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"everyone","plain_action":"Update Microsoft Outlook through Windows or Office update once Microsoft publishes a fix; the sources do not state a fixed version.","pkeys":[],"ptokens":[],"labels":["high","microsoftoffice","outlook","vendor","windows"],"campaign_type":null,"search_a":"'-110043':13A,16A '-2026':12A,15A 'attack':8A 'code':10A 'cve':11A,14A 'heap':3A 'let':5A 'microsoft':1A 'outlook':2A 'overflow':4A 'remot':7A 'run':9A","search_b":"'affect':54B 'attack':36B 'base':26B 'buffer':27B 'code':38B 'detail':48B 'execut':39B 'give':45B 'heap':25B 'heap-bas':24B 'let':33B 'microsoft':18B,30B 'microsoft-offic':17B 'network':42B 'offic':19B,31B 'outlook':20B,32B 'overflow':28B 'path':52B 'reach':37B 'sourc':44B 'trigger':51B 'unauthor':35B 'vendor':21B 'version':55B 'window':22B","search_c":"'allow':65C 'attack':68C 'base':58C 'buffer':59C 'code':71C 'execut':70C 'heap':57C 'heap-bas':56C 'microsoft':62C 'network':74C 'offic':63C 'outlook':64C 'overflow':60C 'unauthor':67C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:18:20+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-2026-110043","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-110043","severity":null,"published_at":"2026-11-10T19:18:20+00:00","modified_at":"2026-11-10T19:18:20+00:00","first_seen_at":"2026-11-10T19:24:26+00:00","fetched_at":"2026-11-10T19:24:26+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"}