{"cve":"CVE-2019-1758","nvd":{"published":"2019-03-28T01:29:00.453","modified":"2026-06-17T02:29:14.027","status":"Modified","description":"A vulnerability in 802.1x function of Cisco IOS Software on the Catalyst 6500 Series Switches could allow an unauthenticated, adjacent attacker to access the network prior to authentication. The vulnerability is due to how the 802.1x packets are handled in the process path. An attacker could exploit this vulnerability by attempting to connect to the network on an 802.1x configured port. A successful exploit could allow the attacker to intermittently obtain access to the network.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","score":4.3},"cwes":["CWE-287"],"references":["http://www.securityfocus.com/bid/107616","https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190327-c6500","http://www.securityfocus.com/bid/107616","https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190327-c6500"],"products":["cisco:ios"],"source":"nvd","synced_at":"2026-10-19T20:55:22.313337056+00:00"},"epss":{"cve":"CVE-2019-1758","score":0.00593,"percentile":0.48349,"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."]}