CVE-2005-4440 describes a "double-tagging VLAN jumping attack" in the 802.1q VLAN protocol, allowing remote attackers to bypass network segmentation. By sending a message with two 802.1q tags, the second tag can be redirected from a downstream switch after the first is stripped, effectively spoofing VLAN traffic. With a CVSS score of 5.0, this vulnerability has a network attack vector and low attack complexity, potentially leading to information disclosure (integrity impact is partial). There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
802.1qCPE matchmatch criteria | cpe:2.3:a:vlan_protocol:vlan_protocol:802.1q:*:*:*:*:*:*:* |
CVSS version used by this source: 2.0
AV:N/AC:L/Au:N/C:N/I:P/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.