This came after the Australian team’s bus was delayed on its way to training due to traffic being stopped by protesters near The Oval.
The police had to step in and clear the way for the team to reach the training ground.
Notably, the England team bus also faced similar delays caused by the same group of protesters while on their way to Lord’s for a one-off test against Ireland last week.
“That’s something we got to in a security briefing a few days ago,” Cummins told reporters.
“I’ve heard that they are aware of it and are somewhat keeping an eye on it. But that’s as much as we’ve heard.
“So hopefully, that doesn’t happen, of course. But yeah, I heard there were a few different events that were affected.”
‘Just Stop Oil’ protesters have halted the world snooker championship and Premier League rugby final in recent months.
A protester climbed onto a table and scattered a bag of orange powder paint at a snooker tournament while protesters stormed the pitch 15 minutes into the rugby match at Twickenham between Saracens and Sale.
Cummins has long voiced concern about the effects of climate change but has not endorsed the demonstrations.
“My view is that there is always a right way to do something and potentially not the right way to do something,” he said.
“Any time anyone has faith, you just hope you made the right choice.”
ESPNcricinfo reports that the International Cricket Council has set up a spare pitch at The Oval in case activists interfere with the final.
(With input from Reuters)