{"id":"CVE-2026-122169","kind":"vulnerability","aliases":["CVE-2026-122169"],"related":[],"title":"Windows IKE Extension: access control flaw lets a local user spoof","description":"Insufficient granularity of access control in Windows IKE Extension allows an authorized attacker to perform spoofing locally.","summary":"The Windows IKE Extension, which handles IPsec key exchange, has an access control check that is too coarse. An authorized local attacker can perform spoofing on the machine.","severity":"high","cvss":7.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","ipsec","vpn","windows"],"not_affected_if":["non-windows-systems"],"how_to_check":"- Check the Windows build with `winver` against the Microsoft update history for CVE-2026-122169\n- Confirm whether IPsec or VPN features using the IKE Extension are in use","fix":null,"status":"open","published_at":"2026-11-10T19:20:34+00:00","first_seen_at":"2026-11-10T19:25:10+00:00","triaged_at":"2026-11-10T19:44:18+00:00","updated_at":"2026-11-10T19:44:18+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-11-10T19:44:18Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows IKE Extension: access control flaw lets a local user spoof","impact":"medium","summary":"The Windows IKE Extension, which handles IPsec key exchange, has an access control check that is too coarse. An authorized local attacker can perform spoofing on the machine.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","ipsec","vpn"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"local attacker spoofs identity or traffic on the machine","analyst_note":"Check the Microsoft Security Response Center entry for CVE-2026-122169 for affected Windows builds and the patch.","how_to_check":"- Check the Windows build with `winver` against the Microsoft update history for CVE-2026-122169\n- Confirm whether IPsec or VPN features using the IKE Extension are in use","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["non-windows-systems"],"who_is_affected":"Affects Windows systems running the IKE Extension, which is used for IPsec and VPN key exchange. The attacker must already hold a local authorized account on the machine. Sources do not say which Windows builds are affected or whether default configurations are exposed.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000693,"input_tokens":4489,"output_tokens":488,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Check the Microsoft Security Response Center entry for CVE-2026-122169 for affected Windows builds and the patch.","search":"'-122169':14A,17A '-2026':13A,16A 'access':4A,33B,53C 'allow':59C 'attack':43B,62C 'author':41B,61C 'check':35B 'coars':39B 'control':5A,34B,54C 'cve':12A,15A 'exchang':30B 'extens':3A,25B,58C 'flaw':6A 'granular':51C 'handl':27B 'ike':2A,24B,57C 'infrastructur':18B 'insuffici':50C 'ipsec':19B,28B 'key':29B 'let':7A 'local':9A,42B,66C 'machin':49B 'perform':45B,64C 'spoof':11A,46B,65C 'user':10A 'vpn':20B 'window':1A,21B,23B,56C","nicknames":[],"mitigations":[],"who_affected":"Affects Windows systems running the IKE Extension, which is used for IPsec and VPN key exchange. The attacker must already hold a local authorized account on the machine. Sources do not say which Windows builds are affected or whether default configurations are exposed.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","infrastructure","ipsec","vpn","windows"],"campaign_type":null,"search_a":"'-122169':14A,17A '-2026':13A,16A 'access':4A 'control':5A 'cve':12A,15A 'extens':3A 'flaw':6A 'ike':2A 'let':7A 'local':9A 'spoof':11A 'user':10A 'window':1A","search_b":"'access':33B 'attack':43B 'author':41B 'check':35B 'coars':39B 'control':34B 'exchang':30B 'extens':25B 'handl':27B 'ike':24B 'infrastructur':18B 'ipsec':19B,28B 'key':29B 'local':42B 'machin':49B 'perform':45B 'spoof':46B 'vpn':20B 'window':21B,23B","search_c":"'access':53C 'allow':59C 'attack':62C 'author':61C 'control':54C 'extens':58C 'granular':51C 'ike':57C 'insuffici':50C 'local':66C 'perform':64C 'spoof':65C 'window':56C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:20:34+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-122169","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-122169","severity":null,"published_at":"2026-11-10T19:20:34+00:00","modified_at":"2026-11-10T19:20:34+00:00","first_seen_at":"2026-11-10T19:25:10+00:00","fetched_at":"2026-11-10T19:25:10+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"}