SonicWall is investigating a surge of ransomware incidents affecting its Gen 7 firewalls, linked to a potential zero-day vulnerability in its SSL VPN services. The company is collaborating with third-party threat research teams to assess the situation and has advised customers to disable SSL VPN services where feasible and implement security measures to mitigate risks. Previous attacks have exploited similar vulnerabilities, highlighting ongoing concerns about the security of SonicWall's products.