{"id":"CVE-2026-125136","kind":"vulnerability","aliases":["CVE-2026-125136"],"related":[],"title":"Windows Auto-Setup Service: heap overflow lets attacker run code over network","description":"Heap-based buffer overflow in Windows Network Connected Devices Auto-Setup Service allows an unauthorized attacker to execute code over an adjacent network.","summary":"A heap-based buffer overflow in the Windows Network Connected Devices Auto-Setup Service lets an unauthorized attacker execute code. The attack works from an adjacent network, so an attacker on the same local network segment can reach it.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","network-devices","windows"],"not_affected_if":["unknown"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:21:07+00:00","first_seen_at":"2026-11-10T19:25:14+00:00","triaged_at":"2026-11-10T19:26:13+00:00","updated_at":"2026-11-10T19:26:13+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T19:26:13Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Windows Auto-Setup Service: heap overflow lets attacker run code over network","impact":"high","summary":"A heap-based buffer overflow in the Windows Network Connected Devices Auto-Setup Service lets an unauthorized attacker execute code. The attack works from an adjacent network, so an attacker on the same local network segment can reach it.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","network-devices"],"confidence":0.5,"fix_status":"unknown","needs_auth":"no","worst_case":"Attacker runs code on the Windows machine over the adjacent network","analyst_note":"Check Microsoft's advisory for CVE-2026-125136 for affected Windows builds, whether the service is enabled by default, and the patch.","how_to_check":"- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["unknown"],"who_is_affected":"Windows machines running the Network Connected Devices Auto-Setup Service are the systems to look at, and the sources do not say which Windows versions or default settings enable it. Machines not on a shared adjacent network segment are likely at lower risk, but the sources do not confirm this.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000684,"input_tokens":4514,"output_tokens":465,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Check Microsoft's advisory for CVE-2026-125136 for affected Windows builds, whether the service is enabled by default, and the patch.","search":"'-125136':16A,19A '-2026':15A,18A 'adjac':52B,88C 'allow':79C 'attack':9A,44B,48B,56B,82C 'auto':3A,38B,76C 'auto-setup':2A,37B,75C 'base':28B,67C 'buffer':29B,68C 'code':11A,46B,85C 'connect':35B,73C 'cve':14A,17A 'devic':23B,36B,74C 'execut':45B,84C 'heap':6A,27B,66C 'heap-bas':26B,65C 'infrastructur':20B 'let':8A,41B 'local':60B 'network':13A,22B,34B,53B,61B,72C,89C 'network-devic':21B 'overflow':7A,30B,69C 'reach':64B 'run':10A 'segment':62B 'servic':5A,40B,78C 'setup':4A,39B,77C 'unauthor':43B,81C 'window':1A,24B,33B,71C 'work':49B","nicknames":[],"mitigations":[],"who_affected":"Windows machines running the Network Connected Devices Auto-Setup Service are the systems to look at, and the sources do not say which Windows versions or default settings enable it. Machines not on a shared adjacent network segment are likely at lower risk, but the sources do not confirm this.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","infrastructure","networkdevices","windows"],"campaign_type":null,"search_a":"'-125136':16A,19A '-2026':15A,18A 'attack':9A 'auto':3A 'auto-setup':2A 'code':11A 'cve':14A,17A 'heap':6A 'let':8A 'network':13A 'overflow':7A 'run':10A 'servic':5A 'setup':4A 'window':1A","search_b":"'adjac':52B 'attack':44B,48B,56B 'auto':38B 'auto-setup':37B 'base':28B 'buffer':29B 'code':46B 'connect':35B 'devic':23B,36B 'execut':45B 'heap':27B 'heap-bas':26B 'infrastructur':20B 'let':41B 'local':60B 'network':22B,34B,53B,61B 'network-devic':21B 'overflow':30B 'reach':64B 'segment':62B 'servic':40B 'setup':39B 'unauthor':43B 'window':24B,33B 'work':49B","search_c":"'adjac':88C 'allow':79C 'attack':82C 'auto':76C 'auto-setup':75C 'base':67C 'buffer':68C 'code':85C 'connect':73C 'devic':74C 'execut':84C 'heap':66C 'heap-bas':65C 'network':72C,89C 'overflow':69C 'servic':78C 'setup':77C 'unauthor':81C 'window':71C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:21:07+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-125136","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-125136","severity":null,"published_at":"2026-11-10T19:21:07+00:00","modified_at":"2026-11-10T19:21:07+00:00","first_seen_at":"2026-11-10T19:25:14+00:00","fetched_at":"2026-11-10T19:25:14+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"}