Totolink A720R 4.1.5cu.614_B20230630 linux_vlan_reinit sub_40BFA4 command injection

Summaryinfo

A vulnerability labeled as critical has been found in Totolink A720R 4.1.5cu.614_B20230630. Impacted is the function sub_40BFA4 of the file /var/system/linux_vlan_reinit. The manipulation results in command injection. This vulnerability is known as CVE-2025-60683. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as critical has been found in Totolink A720R 4.1.5cu.614_B20230630. Affected is the function sub_40BFA4 of the file /var/system/linux_vlan_reinit. The manipulation with an unknown input leads to a command injection vulnerability. CWE is classifying the issue as CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A command injection vulnerability exists in the ToToLink A720R Router firmware V4.1.5cu.614_B20230630 within the sysconf binary, specifically in the sub_40BFA4 function that handles network interface reinitialization from '/var/system/linux_vlan_reinit'. Input is only partially validated by checking the prefix of interface names, and is concatenated into shell commands executed via system() without escaping. An attacker with write access to this file can execute arbitrary commands on the device.

This vulnerability is traded as CVE-2025-60683 since 09/26/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 11/13/2025). This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• Totolink

Name

• A720R

Version

• 4.1.5cu.614_B20230630

License

• commercial

Website

• Vendor: https://www.totolink.net/

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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