The UPnP IGD implementation in Edimax EdiLinux on the Edimax BR-6104K with firmware before 3.25 Edimax 6114Wg Canyon-Tech CN-WF512 with firmware 1.83 Canyon-Tech CN-WF514 with firmware 2.08 Sitecom WL-153 with firmware before 1.39 and Sweex LB000021 with firmware 3.15 allows remote attackers to execute arbitrary commands via shell metacharacters.