Unrated severityNVD Advisory· Published Dec 21, 2005· Updated Apr 16, 2026
CVE-2005-4440
CVE-2005-4440
Description
The 802.1q VLAN protocol allows remote attackers to bypass network segmentation and spoof VLAN traffic via a message with two 802.1q tags, which causes the second tag to be redirected from a downstream switch after the first tag has been stripped, as demonstrated by Yersinia, aka "double-tagging VLAN jumping attack."
Affected products
1- cpe:2.3:a:vlan_protocol:vlan_protocol:802.1q:*:*:*:*:*:*:*
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
3News mentions
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