NETGEAR Buffer Overflow Vulnerability (CNVD-2021-63380)

NETGEAR D6220 is a wireless modem, NETGEAR R6300 is a wireless router, and NETGEAR EX3700 is a wireless network signal extender. A buffer overflow vulnerability exists in multiple NETGEAR products. The vulnerability stems from a network system or product that does not properly validate data boundaries when performing operations on memory, resulting in incorrect read and write operations being performed to other memory locations associated with it. An attacker could use this vulnerability to cause a buffer overflow or heap overflow, among other things.