A severe authentication bypass vulnerability (CVE-2025-4978) has been uncovered in NETGEAR’s DGND3700v2 wireless routers, enabling unauthenticated attackers to gain full administrative control over affected devices. The flaw, rated with a critical CVSSv4 score of 9.3, stems from a hidden backdoor mechanism in the router’s firmware and impacts versions V1.1.00.15_1.00.15NA. Security researchers warn that exploitation could lead to complete network compromise, including credential theft, malware deployment, and traffic interception.

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