Threatpost editors break down the biggest news stories of this week ended Sept. 13.

That includes:

• Researchers warning that more than one billion mobile usersare at risk from a SIM card flaw being currently exploited by threat actors
• A Telnet backdoor opened more than 1 million Imperial Dabman IoT radiosto hijack
• Wikipedia and World of Warcraft being crippled for days byweekend DDoS attacks
• Microsoft addressing two zero-days under active attack during Patch Tuesday
• Two leaky databases discovered with surprising twists - one owned by DealerLeadsand the other by cybercriminals