CVE-2025-60685 — MEDIUM (5.1)

Vulnerability 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.

CVSS Score

5.1

MEDIUM

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

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

LOW

Affected Products

Vendor	Product	Versions
Totolink	A720R Firmware	4.1.5cu.614_b20230630
Totolink	A720R	-

Related Weaknesses (CWE)

CWE-121

References

http://totolink.comBroken Link
https://github.com/yifan20020708/SGTaint-0-day/blob/main/ToToLink/ToToLink-A720RExploitThird Party Advisory
https://www.totolink.net/Product

FAQ

What is CVE-2025-60685?

CVE-2025-60685 is a vulnerability with a CVSS score of 5.1 (MEDIUM). 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 l...

How severe is CVE-2025-60685?

CVE-2025-60685 has been rated MEDIUM with a CVSS base score of 5.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-60685?

Check the references section above for vendor advisories and patch information. Affected products include: Totolink A720R Firmware, Totolink A720R.