CVE-2025-60685

MediumCVSS 5.1/10Last modified Nov 5, 2026

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.

Metrics

CVSS 3.1 5.1/10CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

Weakness enumeration

CWE-121

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://github.com/yifan20020708/SGTaint-0-day/blob/main/ToToLink/ToToLink-A720R/CVE-2025-60685.mdExploit, Third Party Advisory
https://www.totolink.net/Product

Timeline

Published: Nov 13, 2025
Last modified: Nov 5, 2026
NVD status: Modified

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