Microsoft said it has already patched vulnerabilities revealed in last week's high-profile leak of suspected U.S. National Security Agency spying tools, meaning customers should be protected if they've kept their software up-to-date. From a report: Friday's leak caused concern in the security community. The spying tools include about 20 exploits designed to hack into old versions of Windows, such as Windows XP and Windows Server 2008. However, Microsoft said several patches -- one of which was made only last month -- address the vulnerabilities. "Our engineers have investigated the disclosed exploits, and most of the exploits are already patched," the company said in a blog post late on Friday. Three of the exploits found in the leak have not been patched but do not work on platforms that Microsoft currently supports, such as Window 7 or later and Exchange 2010 or later.