Intelligence agencies have been aware since the end of last year of the breach, which led to WikiLeaks releasing thousands of pages of information.
The revelations in the purloined documents could further complicate ties between the U.S. and Germany.
Encryption used by WhatsApp, Telegram and Signal is useless if devices are infected by spy tools.
Manning's 35-year sentence was commuted by Barack Obama in January.
Manning said much of Obama's legacy was vulnerable as the world was "moving into darker times."
Free Chelsea Manning campaigner Evan Greer hails a victory for democracy.
Assange said last week he would accept extradition if former military intelligence analyst Chelsea Manning were freed and on Wednesday U.S. President Barack Obama commuted Manning's 35-year sentence.
More than 100,000 people signed an official White House petition urging Obama to pardon Manning before he steps down.
Not every tweet is policy. 140 characters saying "big tax" aren't a big tax
Trump says Assange is right, "Russians did not give him the info!"
Alums of the spy agency—none of them fans of Donald Trump—decried selective leaks and a "rush to judgment" that Moscow engineered Trump's election.
Assange has spent four years living in the South American nation's embassy in London.
Leaked speeches and emails show the Democratic presidential nominee wrestling with issues of privacy, cyber surveillance and security.
Julian Assange spoke to Russian state-run news network RT.
How the Democratic nominee plans to use America's energy boom to weaken Russia.
Brazile passed information to the Clinton campaign before a debate in Flint, Michigan.
'Does anyone really think that Russia could influence the American people's choice in any way? Is America a banana republic or what?,' says Russian president.
Latest document dump purports to deal with Hillary Clinton's paid speeches.