According to PSX-Scene forum moderator, "chesh," the now six-day-long PlayStation Network outage may be the result of a particularly exploitative custom firmware (CFW) modification for PS3. In a post on Reddit, chesh claims that a CFW known as "Codename: Rebug" had given its users the ability to log into PSN as if they were doing so from a developer console (or "debug unit").

As a result, chesh contends, this same exploit could allow its users to add funds from "dummy" credit card accounts into their PSN wallets, ostensibly giving them the ability to "unlock" (read: steal) certain PlayStation Store content. Joystiq's research into the purported exploit has turned up multiple tutorials detailing the process, which appears alarmingly easy to execute on consoles running the Rebug CFW.

The hack does not allow its users to access the credit card or other personal information of PSN users, chesh adds. Nevertheless, as we reported earlier today, Sony is working to rule out information theft as part of its investigation during the maintenance outage in which the company is also implementing new security measures.

Sony has not yet responded to our request for comment on this story.

[Image source: rebug.me]

This article was originally published on Joystiq.