This week, Indonesian President Prabowo Subianto thought he was having a private conversation with US President Donald Trump during Middle East peace talks in Egypt.
Instead, a hot-mic incident revealed Prabowo asking Trump to arrange a meeting with his son Don Jr, who serve as executives at the Trump organization.
It represented only one in a string of gaffes made by world leaders when they assume no one can hear them.
Below are five other memorable blunders:
During a defense ceremony in Beijing in early autumn, China's leader Xi Jinping and Russian President Vladimir Putin were overheard discussing organ replacement as a method for prolonging life.
"Human organs can be repeatedly transplanted. The more you extend your life, the younger you become, and it's possible to even reach eternal life," the Russian translator was recorded stating.
Xi, who was off camera, responded in Chinese: "Experts forecast that in this century humans may reach 150 years old."
Dialogue heard between China's leader Xi Jinping and Moscow's head Vladimir Putin
Ex-Australia immigration minister Peter Dutton came under fire in 2015 when he joked about the plight of residents in the Pacific experiencing rising sea levels.
Dutton was conversing with then-prime minister Tony Abbott, who had recently come back from climate change talks with Pacific Island leaders in Port Moresby.
Observing how a meeting about refugees was running on "Cape York time", Abbott replied: "There was a similar situation up in Port Moresby."
Dutton commented: "Time doesn't mean anything when you're about to have the ocean reaching your home."
The comments provoked anger from Pacific Islands and environmentalists, while the opposition Labor party demanded Dutton to apologise.
Peter Dutton overheard joking with Tony Abbott about coastal flooding
While serving as UK PM Gordon Brown was on the trail in 2010, he faced a constituent who challenged him on migration and the economic situation.
Remaining connected to a Sky news microphone when he got into his vehicle, Brown was recorded stating: "That was a disaster – they should never have put me with that individual. Whose idea was that? Absurd."
Asked what she had said, he answered: "Everything, she was just a prejudiced person."
The scandal received extensive coverage for an extended period and Brown ultimately lost the election.
Ex-American leader Barack Obama was in discussion at the international conference in Cannes in 2011 with then French president Nicolas Sarkozy when their comments about Israel's prime minister Benjamin Netanyahu were captured by a live microphone.
Sarkozy stated: "I cannot bear Netanyahu. He deceives."
Per a account from a French interpreter quoted by Reuters, Obama replied: "You're fed up with him but I must work with him more often than you."
A vintage hot-mic moment from former White House hopeful George W. Bush happened as he made a negative comment about a reporter from The New York Times.
The GOP candidate was didn't realize that a recording device was active when he turned to Dick Cheney at a Labor Day rally and remarked, "There's Adam Clymer, complete jerk from the New York Times."
Cheney answered: "Absolutely, that's true, big time."
Bush at a political gathering in 2000