A lecture at the University of Guelph was hacked by an outside party, the university said on Friday.
The hack happened earlier this week, and the school announced the hack on Wednesday.
"The hacker made racist and unacceptable statements, which were heard by students and instructors," a statement from the university said in part.
"A video of the incident is also circulating on social media."
Officials with the school confirmed that the lecture was hacked by an outside source, who "took measures to cloak their identity."
A spokesperson for the university called the incident "unfortunate and upsetting," but noted that other institutions around the world have also faced similar incidents.
Back in June, Toronto police announced they were investigating an anti-Semitic "Zoom-bombing" at an online synagogue service. Back in the spring, a Toronto MPP said he was the victim of a Zoom hacking during an online education town hall.
In May, hackers broadcast child pornography during a Chatham-Kent charity call.
The rise in Zoom hackings has led to the company reworking its security.
"We have been deeply upset to hear about these types of incidents, and Zoom strongly condemns such behavior," a Zoom spokesperson said as part of a statement.
"We have recently updated a number of default settings and added features to help hosts more easily access in-meeting security controls, including controlling screen sharing, removing and reporting participants, and locking meetings, among other actions."
The university said it will keep the file open and investigate, and has since put more restrictive settings in place.
Wilfrid Laurier University said it uses Microsoft Teams and Zoom for online learning.
"In order to prevent disturbances in our online classes, we have worked closely with Zoom and Microsoft to enable a number of security options that allow our presenters to manage participants and reduce the risk of a disruption," an emailed statement from WLU said in part. "We also ran a number of tutorials for faculty on how to organize and run online sessions over Zoom to enable them to quickly respond to any situations that may arise.”
The University of Waterloo said it uses Microsoft Teams, Cisco WebEX and Bongo, which is a D2L system. Officials said the softwares have a "secure central authentication system."