By Christopher Bing and Raphael Satter WASHINGTON (Reuters) – A flaw in Apple’s software exploited by Israeli surveillance firm NSO Group to break into iPhones in 2021 was simultaneously abused by a competing company, according to five people familiar with the matter. QuaDream, the sources said, is a smaller and lower profile Israeli firm that also develops smartphone hacking tools intended for government clients. The two rival businesses gained the same ability last year to remotely break into iPhones, according to the five sources, meaning that both firms could compromise Apple phones withou…