CVE-2026-24436CWE-307

Tenda W30E V2 Lacks Rate Limiting on Authentication

Critical · published January 26, 2026

CVSS v4.0
9.2
EPSS
0%
Percentile
39.2
In the wild
Unconfirmed
What it is

🚨 Without rate limiting, attackers can try an unlimited number of passwords on your Tenda W30E V2 — it’s like leaving the door wide open for anyone with a keyring of guesses! 🔥 Think of it as a restaurant where anyone can keep trying to enter through the front door without any checks. No bouncer at the entrance means anyone can come in and guess the code to the safe right behind the counter, no questions asked! This vulnerability allows malicious actors to launch unrestricted brute-force attacks against administrative credentials. If they succeed, they could gain full control of your device, potentially compromising your entire network. This situation could lead to devastating breaches, exposing sensitive information or worse!

Put simply

Think of it as a restaurant where anyone can keep trying to enter through the front door without any checks. No bouncer at the entrance means anyone can come in and guess the code to the safe right behind the counter, no questions asked! The Tenda W30E V2 firmware suffers from a lack of enforcement on rate limiting and account lockout mechanisms at its authentication endpoints, enabling attackers to repeatedly attempt to guess the admin credentials without any deterrence.

What to do

This vulnerability allows malicious actors to launch unrestricted brute-force attacks against administrative credentials. If they succeed, they could gain full control of your device, potentially compromising your entire network. This situation could lead to devastating breaches, exposing sensitive information or worse! Patch your firmware immediately to version V16.01.0.20(5037) or later to block brute-force access. Additionally, consider implementing stronger password policies and enabling two-factor authentication where possible to add another layer of security. Don't let your guard down! You’ve got this! Follow these steps and you’ll lock your network down tight in no time! 🛡️

The record
Technical detail
CVSS v4.0
9.2 · CRITICAL
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
EPSS
0.00463 · 39.2th percentile
Weakness
CWE-307 · Improper Restriction of Excessive Authentication Attempts
Published
2026-01-26T17:40Z
EPSS history
Timeline
  • 26 JAN 17:40Z
    Tenda W30E V2 Lacks Rate Limiting on Authentication
    cvelistv5