CVE-2006-2559

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2006-05-24 · updated 2026-06-16

Description

Linksys WRT54G Wireless-G Broadband Router allows remote attackers to bypass access restrictions and conduct unauthorized operations via a UPnP request with a modified InternalClient parameter, which is not validated, as demonstrated by using AddPortMapping to forward arbitrary traffic.

Affected products

Linksys Wrt54G: 1.42.3, 2.00.8, 2.02.7, 2.04.4, 2.04.4_non_default, 3.01.3 (+2)
Linksys Wrt54G V5: all versions

References

http://secunia.com/advisories/20161
http://securitytracker.com/id?1016134
http://www.securityview.org/dutch-student-finds-a-bug-in-upnp.html
http://www.securityview.org/how-does-the-upnp-flaw-works.html
http://www.vupen.com/english/advisories/2006/1909
https://exchange.xforce.ibmcloud.com/vulnerabilities/26707
http://secunia.com/advisories/20161
http://securitytracker.com/id?1016134
http://www.securityview.org/dutch-student-finds-a-bug-in-upnp.html
http://www.securityview.org/how-does-the-upnp-flaw-works.html
http://www.vupen.com/english/advisories/2006/1909
https://exchange.xforce.ibmcloud.com/vulnerabilities/26707

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