SQL slammer worm
In June 2002, Microsoft released a patch that fixed the weakness that the SQL worm attacked. However, many people did not fix the weakness. In January 2003, the worm was released. Within ten minutes of its release, it had attacked and infected 75,000 internet servers. Bank of America was one of the largest companies affected by the worm. Many of its ATM's would not work for consumers. The damage got worse, and on January 25, 2003, the worm cause a global internet slowdown. The worm was reported to have interfered with 911 calls and was responsible for many canceled flights.