VAR-202511-0384
Vulnerability from variot - Updated: 2025-12-19 22:38A stack buffer overflow exists in the ToToLink A720R Router firmware V4.1.5cu.614_B20230630 within the sysconf binary (sub_401EE0 function). The binary reads the /proc/stat file using fgets() into a local buffer and subsequently parses the line using sscanf() into a single-byte variable with the %s format specifier. Maliciously crafted /proc/stat content can overwrite adjacent stack memory, potentially allowing an attacker with filesystem write privileges to execute arbitrary code on the device. TOTOLINK of A720R A stack-based buffer overflow vulnerability exists in the firmware.Information is obtained and service operation is interrupted (DoS) It may be in a state. The TOTOLINK A720R is a wireless router launched by TOTOLINK, a Chinese electronics company. It features dual-band Wi-Fi and emphasizes high-speed network and signal coverage. This vulnerability stems from a failure to properly validate the length of input data in the sysconf binary. Detailed vulnerability information is currently unavailable
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Nomenclature
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