CVE-2025-60686

MEDIUM
2025-11-13 [email protected]
5.1
CVSS 3.1
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CVSS Vector

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

Lifecycle Timeline

3
Analysis Generated
Mar 28, 2026 - 19:22 vuln.today
PoC Detected
Nov 19, 2025 - 17:41 vuln.today
Public exploit code
CVE Published
Nov 13, 2025 - 16:15 nvd
MEDIUM 5.1

Tags

Stack Overflow Denial Of Service Buffer Overflow RCE A720R Firmware Lr1200Gb Firmware Nr1800x Firmware TOTOLINK

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.

Analysis

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. Rated medium severity (CVSS 5.1), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical Context

This vulnerability is classified under CWE-121. 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 products include: Totolink A720R Firmware, Totolink Lr1200Gb Firmware, Totolink Nr1800X Firmware.

Affected Products

Totolink A720R Firmware, Totolink Lr1200Gb Firmware, Totolink Nr1800X Firmware.

Remediation

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Priority Score

46
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +26
POC: +20

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CVE-2025-60686 vulnerability details – vuln.today
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