Vulnerability Monitor

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CVE-2025-60685

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

2025-11-13T16:15:52.470

Last Modified

2025-11-17T21:50:14.877

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 5.1 (MEDIUM)

Weaknesses

Type: Secondary
CWE-121

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	totolink	a720r_firmware	4.1.5cu.614_b20230630	Yes
Hardware	totolink	a720r	-	No

References

http://totolink.com Broken Link ([email protected])
https://github.com/yifan20020708/SGTaint-0-day/blob/main/ToToLink/ToToLink-A720R/CVE-2025-60685.md Exploit, Third Party Advisory ([email protected])
https://www.totolink.net/ Product ([email protected])