Final answer:
The Slammer worm exploited a buffer overflow in Microsoft SQL Server 2000 in 2003.
Step-by-step explanation:
In 2003, the Slammer worm exploited a buffer overflow in Microsoft SQL Server 2000.
A buffer overflow occurs when a program tries to store more data in a buffer than it can hold, leading to memory corruption and potential security vulnerabilities. The Slammer worm took advantage of this flaw in Microsoft SQL Server 2000 to spread rapidly and disrupt networks.
This event highlighted the importance of regularly updating software and implementing security measures to protect against such vulnerabilities.