Tenda W30E V2 Lacks Rate Limiting on Authentication

Advisories

severity: critical
date: January 26, 2026
Affecting: W30E V2 firmware <= v16.01.0.19(5037)
CVE: CVE-2026-24436
CWE: CWE-307 Improper Restriction of Excessive Authentication Attempts
CVSS: 9.2
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References: Tenda Product Webpage
Credit: Kazuma Matsumoto, a security researcher at GMO Cybersecurity by IERAE, Inc.
Description: Shenzhen Tenda W30E V2 firmware versions up to and including V16.01.0.19(5037) do not enforce rate limiting or account lockout mechanisms on authentication endpoints. This allows attackers to perform unrestricted brute-force attempts against administrative credentials.