CVE-2025-60686: A local stack-based buffer overflow vulnerability exists in the infostat.cgi and cstecgi.cgi binaries of ToToLink routers (A720R V4.1.5cu.614_B20230630…

PriorityP428medium5.1CVSS 3.1

AVLACLPRNUINSUCLINAL

EPSS

0.21%

12.0th percentile

A local stack-based buffer overflow vulnerability exists in the infostat.cgi and cstecgi.cgi binaries of ToToLink routers (A720R V4.1.5cu.614_B20230630, LR1200GB V9.1.0u.6619_B20230130, and NR1800X V9.1.0u.6681_B20230703). Both programs parse the contents of /proc/net/arp using sscanf() with "%s" format specifiers into fixed-size stack buffers without length validation. Specifically, one function writes user-controlled data into a single-byte buffer, and the other into adjacent small arrays without bounds checking. An attacker who controls the contents of /proc/net/arp can trigger memory corruption, leading to denial of service or potential arbitrary code execution.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
totolink	a720r_firmware	—	—
totolink	lr1200gb_firmware	—	—
totolink	nr1800x_firmware	—	—

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