Residents in Denver were subject to explicit messages while crossing the city's streets after hackers manipulated the audio to play hateful remarks about the president.
'The walk signal is on, f* Trump,' announced a pedestrian signal. 'The walk signal is on, Trump murders children.'
Department of Transportation and Infrastructure Communications Director Nancy Kuhn told the Denver Post that the vile messages blared at two crosswalks on East Colfax Avenue over the weekend. One at North Pearl Street and a second at North Washington Street.
Hackers easily accessed the pedestrian signals because the crosswalk push buttons were recently installed and in their default mode, said Kuhn.
The devices were 'still bagged and with their factory settings that included a default password that we now have learned is easy to find online,' the director added.
Kuhn noted that passwords have since been changed and that they do not expect a situation like this to happen again.
The crosswalk sign at Colfax Avenue and Pearl Street was shut down on Friday night, and the one on Washington Street was disconnected, Kuhn said.
'This happens a lot,' Daniel Pittman, an expert in cybersecurity with Metropolitan State University of Denver, told CBS News.
Crosswalks in Denver were hacked over the weekend to blare vile messages about the president after they were easily accessed by default passwords available on the internet
The messages were heard playing: 'The walk signal is on, f* Trump. The walk signal is on, Trump murders children'
'When you look at construction working signs, the ones who put the messages on, I'm sure you've seen internet memes about people that have put their own messages on them and stuff like that.'
'And it always comes down to weak credentials, default credentials, and they're publicly available,' he added.
Footage uploaded to social media of the hacked crosswalks has gone viral, sparking outrage and applause for the hackers.
One disgruntled user wrote: 'I live here in Denver. Find another way to spread whatever message you have, other than by hacking a safety measure that helps people not get hit by cars. I don't care who you like or don't like. Grow up and do better. Losers.'
Another simply added: 'Do better, Denver.'
A third opposed those who enjoyed the messages: 'I'm sorry, the fact that Americans laugh about this terrifies me.'
Department of Transportation and Infrastructure Communications Director Nancy Kuhn told the Denver Post that the pedestrian signal have been fixed and their passwords are now more secure
However, many were delighted by the messages, even pleading with the city to keep the audio.
One wrote: 'Hack them all with this! It's a service to humanity.'
A second added, 'Please tell me they didn't change it back! I wanna hear it in person!'
A third noted: 'What an amazing use of free will and IT skills.'
The Daily Mail has reached out to the Denver Department of Transportation and Infrastructure for comment.