Fortinet has released a security bulletin flagging a critical severity flaw in its Fortinet Wireless Manager (FortiWLM) product.The flaw, which was first discovered in May 2023, allows attackers to take over vulnerable endpoints remotely.Users are advised to update their FortiWLM version immediately to mitigate the vulnerability.The bug remained undisclosed for several months, making it a zero-day vulnerability for a significant period of time.