Foscam will be posting a firmware upgrade on their website to fix this issue. Unfortunately, most users will never know about it.

Test Your Camera - A quick way to verify and confirm if your camera has this issue:
1. Enter your camera's IP address in your web browser. Example: 192.168.1.101
2. When you see the password screen do not enter a User Id and Password. Simply click the OK button. If you see your camera, you have the problem.
Use this work-around for temporary protection (here), and be sure to upgrade the firmware when it becomes available (here).