<i>&quot;It&#x27;s not clear how the code got there or how long it has been there. An advisory published by the company said that NetScreen firewalls using ScreenOS 6.2.0r15 through 6.2.0r18 and 6.3.0r12 through 6.3.0r20 are affected and require immediate patching&quot;</i><p>If the use a Subversion&#x2F;Git code repo to maintain their codebase, they should be able to track down who wrote the code and when.