CVE-2026-24430 is a vulnerability identified in the Shenzhen Tenda Technology Co., Ltd. W30E V2 router firmware versions up to and including V16.01.0.19(5037). The vulnerability is categorized under CWE-201, which involves the insertion of sensitive information into sent data. Specifically, the router's maintenance interface responds to HTTP requests with sensitive account credentials embedded in cleartext within the HTTP response bodies. This exposure occurs because the management interface is accessible over unencrypted HTTP by default, lacking encryption such as HTTPS. Consequently, any attacker with network access—such as on the same local network or via compromised network segments—can intercept these HTTP responses and extract administrative credentials without requiring authentication or user interaction. The CVSS 4.0 base score is 8.2 (high severity), reflecting network attack vector, high attack complexity, no privileges or user interaction required, and high confidentiality impact. The vulnerability does not affect integrity or availability directly but compromises confidentiality of sensitive credentials. No patches or firmware updates are currently linked, and no known exploits have been reported in the wild as of the publication date. This vulnerability enables attackers to gain unauthorized administrative access to the router, potentially allowing them to alter configurations, intercept or redirect traffic, or launch further attacks within the network.

The primary impact of CVE-2026-24430 is the exposure of administrative credentials in plaintext over an unencrypted management interface. This can lead to unauthorized access to the router's management console, allowing attackers to change device configurations, disable security features, or redirect network traffic. For organizations, this can result in network compromise, data interception, and lateral movement within internal networks. The vulnerability is particularly dangerous in environments where the router management interface is accessible beyond trusted internal networks or where network segmentation is weak. Since exploitation requires network access but no authentication, attackers who gain local network access—via Wi-Fi, compromised devices, or insider threats—can leverage this vulnerability. The lack of encryption in the management interface also increases the risk in environments using public or shared networks. The overall impact includes loss of confidentiality, potential integrity violations through configuration changes, and indirect availability impacts if the attacker disrupts network services. Given the widespread use of Tenda routers in residential, small business, and some enterprise contexts, the vulnerability poses a significant risk to a broad range of organizations worldwide.

To mitigate CVE-2026-24430, organizations should implement the following specific measures: 1) Immediately restrict access to the router's management interface by limiting it to trusted, isolated network segments or via VPNs to prevent unauthorized network access. 2) Disable remote management over HTTP if enabled, or configure it to use HTTPS with strong encryption to prevent credential interception. 3) Monitor network traffic for unauthorized access attempts or unusual HTTP requests targeting the router's maintenance interface. 4) Change default administrative credentials to strong, unique passwords to reduce risk if credentials are exposed. 5) Regularly check for and apply firmware updates from Shenzhen Tenda that address this vulnerability once available. 6) Employ network segmentation and strong Wi-Fi security controls to limit attacker access to the local network. 7) Consider replacing affected devices with models that enforce secure management interfaces by default. These steps go beyond generic advice by focusing on access control, encryption enforcement, and proactive monitoring tailored to this vulnerability's characteristics.