{"cve":"CVE-2005-4441","nvd":{"published":"2005-12-21T02:03:00.000","modified":"2026-06-16T22:18:48.207","status":"Modified","description":"The PVLAN protocol allows remote attackers to bypass network segmentation and spoof PVLAN traffic via a PVLAN message with a target MAC address that is set to a gateway router, which causes the packet to be sent to the router, where the source MAC is modified, aka \"Modification of the MAC spoofing PVLAN jumping attack,\" as demonstrated by pvlan.c.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://lists.grok.org.uk/pipermail/full-disclosure/2005-December/040333.html","http://www.securityfocus.com/archive/1/419831/100/0/threaded","http://www.securityfocus.com/archive/1/419834/100/0/threaded","http://lists.grok.org.uk/pipermail/full-disclosure/2005-December/040333.html","http://www.securityfocus.com/archive/1/419831/100/0/threaded"],"products":["pvlan_protocol:pvlan_protocol"],"source":"nvd","synced_at":"2026-10-19T19:40:09.211843075+00:00"},"epss":{"cve":"CVE-2005-4441","score":0.01611,"percentile":0.75953,"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."]}