CVE-2025-15254 identifies a remote OS command injection vulnerability in the Tenda W6-S router firmware version 1.0.0.4(510). The vulnerability exists in the TendaAte function of the /goform/ate endpoint, part of the ATE Service component responsible for automated testing or device configuration. An attacker can craft malicious input to this endpoint that is improperly sanitized, allowing arbitrary OS commands to be executed with the privileges of the service process. The vulnerability requires no authentication or user interaction and can be triggered remotely over the network, making it a critical entry point for attackers to gain control over the device. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:L), no user interaction (UI:N), and partial impact on confidentiality, integrity, and availability (VC:L, VI:L, VA:L). Although the CVSS score is medium (5.3), the ability to execute OS commands remotely without authentication elevates the risk for exploitation. No known exploits are reported in the wild yet, and no official patches or vendor advisories have been published at this time. The vulnerability affects only the specified firmware version, but similar versions may also be at risk if they share the same vulnerable code. This flaw could be leveraged to execute arbitrary commands, potentially leading to device takeover, network disruption, or pivoting to internal networks.

The impact of CVE-2025-15254 is significant for organizations using the Tenda W6-S router, especially those running the vulnerable firmware version 1.0.0.4(510). Successful exploitation can lead to full compromise of the router, allowing attackers to execute arbitrary commands, modify configurations, intercept or redirect network traffic, and potentially launch further attacks on internal networks. This can result in loss of confidentiality, integrity, and availability of network communications. For enterprises and service providers relying on these devices for critical connectivity, the vulnerability could disrupt business operations, expose sensitive data, and facilitate lateral movement by threat actors. The lack of authentication and user interaction requirements increases the ease of exploitation, raising the risk of automated attacks and wormable scenarios. Although no active exploitation has been reported, the public disclosure of the vulnerability and exploit details could prompt attackers to develop weaponized exploits. The vulnerability also undermines trust in the security of IoT and networking devices from this vendor, potentially affecting supply chain security.

To mitigate CVE-2025-15254, organizations should immediately restrict external and internal network access to the /goform/ate endpoint on Tenda W6-S routers by implementing firewall rules or access control lists that limit access to trusted management networks only. Network segmentation should be enforced to isolate vulnerable devices from critical infrastructure. Monitoring network traffic for unusual or unexpected requests to the ATE Service endpoint can help detect exploitation attempts. Since no official patch is currently available, consider temporarily disabling or restricting the ATE Service if possible, or replacing affected devices with updated models or alternative vendors. Regularly check for vendor advisories and firmware updates addressing this vulnerability and apply patches promptly once released. Employ network intrusion detection/prevention systems (IDS/IPS) with signatures targeting this vulnerability or related attack patterns. Additionally, maintain an inventory of all Tenda devices and their firmware versions to identify and prioritize remediation efforts. Educate network administrators about the risks and signs of exploitation to improve incident response readiness.