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Description

A 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.

PUBLISHED Reserved 2025-09-26 | Published 2025-11-13 | Updated 2025-11-13 | Assigner mitre

References

totolink.com

www.totolink.net/

github.com/...main/ToToLink/ToToLink-A720R/CVE-2025-60685.md

cve.org (CVE-2025-60685)

nvd.nist.gov (CVE-2025-60685)

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