{"cve":"CVE-2013-6979","nvd":{"published":"2013-12-23T22:55:03.177","modified":"2026-06-17T00:01:13.813","status":"Modified","description":"The VTY authentication implementation in Cisco IOS XE 03.02.xxSE and 03.03.xxSE incorrectly relies on the Linux-IOS internal-network configuration, which allows remote attackers to bypass authentication by leveraging access to a 192.168.x.2 source IP address, aka Bug ID CSCuj90227.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-287"],"references":["http://osvdb.org/101351","http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-6979","http://www.securityfocus.com/bid/64502","http://www.securitytracker.com/id/1029537","https://exchange.xforce.ibmcloud.com/vulnerabilities/89901"],"products":["cisco:ios_xe"],"source":"nvd","synced_at":"2026-10-19T20:30:15.895642412+00:00"},"epss":{"cve":"CVE-2013-6979","score":0.03602,"percentile":0.89462,"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."]}