{"id":"CVE-2026-20241","kind":"vulnerability","aliases":["CVE-2026-20241"],"related":[],"title":"Cisco ISE: missing authorization lets remote users obtain endpoint identity certificates","description":"A vulnerability in the authorization mechanism of Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) could allow an unauthenticated, remote attacker to obtain an endpoint identity certificate.\r\n\r\nThis vulnerability is due to improper authorization checks. An attacker could exploit this vulnerability by sending a crafted request to an affected device. A successful exploit could allow the attacker to bypass authorization to obtain an endpoint certificate.","summary":"Cisco Identity Services Engine and its Passive Identity Connector check authorization improperly on some requests. An unauthenticated remote attacker can send a crafted request and obtain an endpoint identity certificate.","severity":"medium","cvss":5.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["cisco","infrastructure","ise","network-access-control"],"not_affected_if":["not-running-ise","not-running-ise-pic"],"how_to_check":"- Confirm whether Cisco ISE or ISE-PIC is deployed in the environment\n- Check the installed version against the affected ranges in the Cisco advisory (unknown from these sources)","fix":null,"status":"open","published_at":"2026-11-04T17:17:35+00:00","first_seen_at":"2026-11-04T17:28:12+00:00","triaged_at":"2026-11-04T17:28:47+00:00","updated_at":"2026-11-04T17:28:47+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-11-04T17:28:47Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Cisco ISE: missing authorization lets remote users obtain endpoint identity certificates","impact":"medium","summary":"Cisco Identity Services Engine and its Passive Identity Connector check authorization improperly on some requests. An unauthenticated remote attacker can send a crafted request and obtain an endpoint identity certificate.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["cisco","ise","network-access-control"],"confidence":0.6,"fix_status":"unknown","needs_auth":"no","worst_case":"attacker obtains an endpoint identity certificate without credentials","analyst_note":"Check the Cisco security advisory for affected and fixed versions and any workaround; the NVD entry alone gives neither.","how_to_check":"- Confirm whether Cisco ISE or ISE-PIC is deployed in the environment\n- Check the installed version against the affected ranges in the Cisco advisory (unknown from these sources)","plain_action":"","needs_analyst":true,"not_affected_if":["not-running-ise","not-running-ise-pic"],"who_is_affected":"Organizations running Cisco Identity Services Engine or Cisco ISE Passive Identity Connector are potentially exposed, since an unauthenticated remote attacker can send a crafted request to an affected device. The sources do not list affected versions or configurations. Teams not running these Cisco products can skip it.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.00069,"input_tokens":4202,"output_tokens":540,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-20241':14A,17A '-2026':13A,16A 'access':23B 'affect':109C 'allow':77C,115C 'attack':43B,81C,97C,117C 'author':4A,35B,59C,94C,120C 'bypass':119C 'certif':11A,54B,87C,125C 'check':34B,95C 'cisco':1A,18B,25B,62C,68C 'connector':33B,72C 'control':24B 'could':76C,98C,114C 'craft':47B,105C 'cve':12A,15A 'devic':110C 'due':91C 'endpoint':9A,52B,85C,124C 'engin':28B,65C 'exploit':99C,113C 'ident':10A,26B,32B,53B,63C,71C,86C 'improp':36B,93C 'infrastructur':19B 'ise':2A,20B,66C,69C,74C 'ise-p':73C 'let':5A 'mechan':60C 'miss':3A 'network':22B 'network-access-control':21B 'obtain':8A,50B,83C,122C 'passiv':31B,70C 'pic':75C 'remot':6A,42B,80C 'request':39B,48B,106C 'send':45B,103C 'servic':27B,64C 'success':112C 'unauthent':41B,79C 'user':7A 'vulner':56C,89C,101C","nicknames":[],"mitigations":[],"who_affected":"Organizations running Cisco Identity Services Engine or Cisco ISE Passive Identity Connector are potentially exposed, since an unauthenticated remote attacker can send a crafted request to an affected device. The sources do not list affected versions or configurations. Teams not running these Cisco products can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["cisco","infrastructure","ise","medium","networkaccesscontrol"],"campaign_type":null,"first_public_at":"2026-11-04T17:17:35+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cvss_by":"psirt@cisco.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-20241","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20241","severity":null,"published_at":"2026-11-04T17:17:35+00:00","modified_at":"2026-11-04T17:17:35+00:00","first_seen_at":"2026-11-04T17:28:12+00:00","fetched_at":"2026-11-04T17:28:12+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}