CVE-2026-24436 describes an improper restriction of excessive authentication attempts in Shenzhen Tenda Technology Co., Ltd.'s W30E V2 router firmware versions up to V16.01.0.19(5037). The firmware does not implement rate limiting or account lockout mechanisms on its authentication endpoints, allowing an unauthenticated attacker to perform unlimited brute-force attempts to guess administrative credentials. This vulnerability has a critical severity rating with a CVSS 4.0 score of 9.2, indicating high impact and exploitability. No patch or official fix has been documented, and no known exploits have been reported.

Successful exploitation could allow an attacker to gain unauthorized administrative access to the affected device by brute forcing credentials without restriction. This could lead to full control over the device, potentially compromising network security and device functionality. The lack of rate limiting significantly increases the risk of credential compromise.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, it is recommended to restrict network access to the device's administrative interface, use strong and unique passwords, and monitor for suspicious login attempts. Avoid exposing the device's management interface to untrusted networks.