As far back as September, security researchers discovered a "critical" bug in many HTC Android handsets that exposed users' WiFi credentials to any hacker who cared to look. The flaw affected recent devices like the Thunderbolt and EVO 4G all the way back to the Desire HD. The researchers promptly notified HTC, but the manufacturer waited a full five months before acknowledging the flaw publicly a few days ago. Sounds shady, perhaps, but HTC sent us a statement clarifying that this is standard policy to protect customers. It says it waited to develop a fix before it alerted the big bad world to the vulnerability. Most newer devices have already received their fix OTA, but owners of some older phones -- we'll update this post when we know exactly which ones -- will need to check the HTC Support site for a manual update next week. Meanwhile, in manufacturer's defense, the guys at the Open1X group who discovered the bug say that HTC was "very responsive and good to work with." Here's HTC's statement to us:
Source: http://www.engadget.com/2012/02/03/htc-acknowledges-wifi-security-flaw-says-it-deliberately-kept-i/