CVE-2025-60685 Memory corruption in n/a

Medium 5.1 Published 13 Nov 2025 Updated 5 Jul 2026

A stack buffer overflow in ToToLink router firmware allows arbitrary code execution if an attacker can modify the /proc/stat file.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-60685?

CVE-2025-60685 is a medium-severity memory corruption vulnerability in n/a, published on 13 Nov 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-121

Which versions are affected by CVE-2025-60685?

It affects 1 product.

Products include Totolink A720r Firmware.

How do I fix CVE-2025-60685?

No fix has been published for CVE-2025-60685 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2025-60685 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-60685 exists.

Sources

Also known as GHSA-273x-ghvh-vxh2.