CVE-2025-15076 is a path traversal vulnerability identified in Tenda CH22 firmware version 1.0.0.1. The vulnerability exists in an unspecified function related to the /public/ directory, where improper input validation allows an attacker to manipulate file paths. This manipulation enables traversal outside the intended directory scope, potentially exposing sensitive files on the device's filesystem. The attack vector is remote network access without requiring authentication or user interaction, making exploitation straightforward. The CVSS 4.0 score of 6.9 reflects a medium severity, considering the ease of exploitation (no privileges or user interaction needed) but limited impact scope (confidentiality, integrity, and availability impacts are low to limited). The exploit has been publicly disclosed, increasing the likelihood of exploitation attempts. No official patches or mitigations have been released by Tenda at the time of publication. The vulnerability could be leveraged to gather sensitive configuration data, potentially leading to further compromise or lateral movement within a network. Given the device's role as a network router or gateway, successful exploitation could undermine network security and privacy.

For European organizations, this vulnerability poses a risk of unauthorized disclosure of sensitive device files, which may contain configuration details, credentials, or network topology information. Such exposure can facilitate further attacks, including network intrusion, data exfiltration, or persistent access. Organizations relying on Tenda CH22 devices in enterprise or critical infrastructure environments could face increased risk of network compromise. The lack of authentication and user interaction requirements lowers the barrier for attackers, potentially enabling automated scanning and exploitation campaigns. While direct disruption of service is unlikely, the confidentiality and integrity of network management data are at risk. This could lead to broader security incidents, especially in sectors like telecommunications, government, and industrial control systems where network devices are critical.

Immediate mitigation should focus on restricting remote access to the Tenda CH22 management interface, ideally limiting it to trusted internal networks via firewall rules or VPNs. Network segmentation should isolate vulnerable devices from sensitive systems to reduce lateral movement risk. Monitoring network traffic for unusual requests targeting the /public/ directory or suspicious path traversal patterns can help detect exploitation attempts. Organizations should maintain an inventory of Tenda CH22 devices and prioritize their replacement or firmware upgrade once patches become available. In the absence of official patches, consider deploying web application firewalls (WAFs) or intrusion prevention systems (IPS) with custom rules to block path traversal payloads. Regularly review device configurations to disable unnecessary services and ensure strong administrative credentials are in place. Engage with Tenda support channels to obtain updates or workarounds.