CVE-2025-15163 is a stack-based buffer overflow vulnerability identified in the Tenda WH450 router firmware version 1.0.0.18. The vulnerability resides in an unknown functionality related to the /goform/SafeEmailFilter endpoint, specifically through the manipulation of the 'page' argument. This improper input validation or bounds checking leads to a stack buffer overflow condition. Because the vulnerable endpoint is accessible remotely and does not require user interaction or authentication, an attacker can exploit this flaw over the network to execute arbitrary code or cause a denial of service. The CVSS 4.0 base score of 8.6 reflects the high impact and ease of exploitation, with network attack vector, low attack complexity, no privileges required, and no user interaction needed. The vulnerability affects the confidentiality, integrity, and availability of the device, potentially allowing attackers to take full control of the router, intercept or manipulate traffic, or disrupt network services. No official patches or fixes have been published yet, and while no exploits are confirmed in the wild, a public exploit exists, increasing the urgency for mitigation. The Tenda WH450 is a consumer and small business wireless router, and its compromise could serve as a foothold for attackers to infiltrate internal networks or launch further attacks.

The impact of CVE-2025-15163 is significant for organizations and individuals using the Tenda WH450 router. Successful exploitation can lead to remote code execution, allowing attackers to gain full control over the device. This compromises the confidentiality of network traffic, as attackers could intercept or redirect data. Integrity is also at risk since attackers could modify router configurations or inject malicious payloads into network communications. Availability may be disrupted through denial of service attacks caused by the buffer overflow. For organizations, this could mean loss of network connectivity, exposure of sensitive data, and a potential pivot point for lateral movement within internal networks. Given the router’s role as a network gateway, exploitation could facilitate broader attacks on connected systems. The availability of a public exploit increases the likelihood of active exploitation attempts, particularly targeting unpatched devices. The lack of official patches further exacerbates the risk, making mitigation and network-level defenses critical.

To mitigate CVE-2025-15163, organizations should first verify if they are using the Tenda WH450 router with firmware version 1.0.0.18. Since no official patch is currently available, immediate mitigation steps include: 1) Restricting access to the router’s management interface by limiting exposure to untrusted networks, especially blocking inbound traffic to the /goform/SafeEmailFilter endpoint at the network perimeter. 2) Implementing network segmentation to isolate vulnerable devices from critical infrastructure. 3) Employing intrusion detection and prevention systems (IDS/IPS) with signatures or heuristics to detect exploitation attempts targeting this vulnerability. 4) Monitoring network traffic for unusual patterns or attempts to access the vulnerable endpoint. 5) Considering temporary replacement or upgrade of the router hardware to a model with a secure firmware version once available. 6) Applying strict firewall rules to prevent remote access to router management interfaces from the internet. 7) Educating users and administrators about the risk and signs of compromise. Once an official patch or firmware update is released by Tenda, organizations should apply it promptly to fully remediate the vulnerability.