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.
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Fixes

Solution

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Workaround

No workaround given by the vendor.

History

Wed, 19 Nov 2025 17:45:00 +0000

Type Values Removed Values Added
First Time appeared Totolink a720r Firmware
Totolink lr1200gb Firmware
Totolink nr1800x Firmware
CPEs cpe:2.3:h:totolink:a720r:-:*:*:*:*:*:*:*
cpe:2.3:h:totolink:lr1200gb:-:*:*:*:*:*:*:*
cpe:2.3:h:totolink:nr1800x:-:*:*:*:*:*:*:*
cpe:2.3:o:totolink:a720r_firmware:4.1.5cu.614_b20230630:*:*:*:*:*:*:*
cpe:2.3:o:totolink:lr1200gb_firmware:9.1.0u.6619_b20230130:*:*:*:*:*:*:*
cpe:2.3:o:totolink:nr1800x_firmware:9.1.0u.6681_b20230703:*:*:*:*:*:*:*
Vendors & Products Totolink a720r Firmware
Totolink lr1200gb Firmware
Totolink nr1800x Firmware

Fri, 14 Nov 2025 09:30:00 +0000

Type Values Removed Values Added
First Time appeared Totolink
Totolink a720r
Totolink lr1200gb
Totolink nr1800x
Vendors & Products Totolink
Totolink a720r
Totolink lr1200gb
Totolink nr1800x

Thu, 13 Nov 2025 18:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-121
Metrics cvssV3_1

{'score': 5.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 13 Nov 2025 16:00:00 +0000

Type Values Removed Values Added
Description 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.
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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2025-11-13T17:37:44.079Z

Reserved: 2025-09-26T00:00:00.000Z

Link: CVE-2025-60686

cve-icon Vulnrichment

Updated: 2025-11-13T17:37:38.550Z

cve-icon NVD

Status : Analyzed

Published: 2025-11-13T16:15:52.590

Modified: 2025-11-19T17:41:28.740

Link: CVE-2025-60686

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-11-14T09:28:22Z

Weaknesses