That is very true. Consider all computers using Windows and iOS(apple) compromised by the NSA. "On Thursday, Microsoft issued a security advisory admitting that it is “aware of a security feature bypass vulnerability” which “affects all supported releases of Microsoft Windows,” in addition to any non-Microsoft software running on a part of Windows called Secure Channel."



http://www.infoworld.com/article/2608141/internet-privacy/snowden--the-nsa-planted-backdoors-in-cisco-products.html

http://www.consumeraffairs.com/news/nsa-backdoor-mandates-lead-to-a-computer-security-freak-show-030615.html