Overview
A critical command injection vulnerability, identified as CVE-2025-60682, has been discovered in the ToToLink A720R Router running firmware version V4.1.5cu.614_B20230630. This flaw allows an unauthenticated remote attacker to execute arbitrary commands on the affected device. The vulnerability stems from insufficient input validation within the cloud update functionality.
Technical Details
The vulnerability resides in the cloudupdate_check binary, specifically within the sub_402414 function. This function processes parameters related to cloud updates. The issue arises because the magicid and url values provided by a user are directly concatenated into shell commands without any sanitization or escaping. This allows an attacker to inject malicious commands by crafting a specially crafted request containing payload within the ‘magicid’ and ‘url’ parameters. The vulnerable code then uses system() to execute the unsanitized concatenated command, resulting in arbitrary command execution with root privileges.
CVSS Analysis
- CVE ID: CVE-2025-60682
- Severity: MEDIUM
- CVSS Score: 6.5
- This score indicates that while the vulnerability is remotely exploitable, the attack complexity is moderately high and the impact is significant in terms of system compromise.
Possible Impact
Successful exploitation of CVE-2025-60682 can have severe consequences:
- Complete device compromise: An attacker can gain full control of the router.
- Data theft: Sensitive information stored on the router or passing through it can be stolen.
- Malware installation: The router can be infected with malware, potentially spreading to connected devices.
- Denial of service: The router can be rendered unusable, disrupting network connectivity.
- Botnet recruitment: The compromised router can be added to a botnet for malicious purposes.
Mitigation and Patch Steps
To mitigate the risk posed by CVE-2025-60682, the following steps are recommended:
- Apply the Patch: Check the ToToLink website for firmware updates. Apply the latest firmware version as soon as it becomes available. This is the most effective way to address the vulnerability.
- Disable Remote Management (If possible): If remote management of the router is not essential, disable it to reduce the attack surface.
- Monitor Network Traffic: Regularly monitor network traffic for suspicious activity.
- Use a Strong Password: Ensure you are using a strong, unique password for your router’s administrative interface. While this vulnerability bypasses authentication, it’s a good security practice to defend against other threats.
