Key Information Vulnerability Overview Vendor: Belkin Product: F9K1122 Version: 1.03.33 Type: Stack Overflow Author: Jiacong Peng Email: pengjiacong@iie.ac.cn Institution: Institute of Information Engineering, Chinese Academy of Sciences (IIE, CAS) Vulnerability Description A stack overflow vulnerability has been discovered in the firmware of Belkin routers, recently released, which allows remote attackers to crash the server. Stack Overflow Details In the function, user input is directly passed to the function. If the input data is excessively long, it triggers a stack overflow, enabling attackers to overwrite the return address and execute arbitrary code. Additional Notes To prevent such issues, it is recommended to validate string content during input extraction. PoC (Proof of Concept) By setting to , the router will crash. Example: Result The router crashes and cannot continue providing services properly.