{"cve":"CVE-2004-1099","nvd":{"published":"2005-01-10T05:00:00.000","modified":"2026-06-16T22:07:01.303","status":"Modified","description":"Cisco Secure Access Control Server for Windows (ACS Windows) and Cisco Secure Access Control Server Solution Engine (ACS Solution Engine) 3.3.1, when the EAP-TLS protocol is enabled, does not properly handle expired or untrusted certificates, which allows remote attackers to bypass authentication and gain unauthorized access via a \"cryptographically correct\" certificate with valid fields such as the username.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://www.ciac.org/ciac/bulletins/p-028.shtml","http://www.cisco.com/warp/public/707/cisco-sa-20041102-acs-eap-tls.shtml","http://www.securityfocus.com/bid/11577","https://exchange.xforce.ibmcloud.com/vulnerabilities/17936","http://www.ciac.org/ciac/bulletins/p-028.shtml"],"products":["cisco:secure_access_control_server","cisco:secure_acs_solution_engine"],"source":"nvd","synced_at":"2026-10-19T19:38:22.000386253+00:00"},"epss":{"cve":"CVE-2004-1099","score":0.10195,"percentile":0.95668,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}