# CVE-2026-24436: Tenda W30E V2 Lacks Rate Limiting on Authentication

> Attackers can brute-force administrative credentials on Tenda W30E V2 routers due to missing rate limiting, leading to potential account takeover.

- **Severity:** Critical 9.2 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 Jan 2026
- **Updated:** 14 May 2026
- **Also known as:** GHSA-j73p-m2g8-wpgm

## What is CVE-2026-24436?

CVE-2026-24436 is a critical missing authorization vulnerability in Tenda W30e Firmware, published on 26 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-307 (Improper Restriction of Excessive Authentication Attempts)

## Which versions are affected by CVE-2026-24436?

It affects 1 product.


Products: Tenda W30e Firmware.

## How do I fix CVE-2026-24436?

No fix has been published for CVE-2026-24436 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-24436 being exploited?

There is no known exploitation of CVE-2026-24436 in the wild and no public exploit code.

## Other vulnerabilities in Tenda W30e Firmware

- [CVE-2026-38835](https://insights.sbomify.com/CVE-2026-38835/): Command injection in n/a (critical 9.8)
- [CVE-2025-57085](https://insights.sbomify.com/CVE-2025-57085/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-32286](https://insights.sbomify.com/CVE-2024-32286/): Memory corruption in n/a (critical 9.8)
- [CVE-2023-49402](https://insights.sbomify.com/CVE-2023-49402/): Memory corruption in n/a (critical 9.8)
- [CVE-2023-49403](https://insights.sbomify.com/CVE-2023-49403/): Command injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-24436 and fix it if it is affected.

What it is: CVE-2026-24436 is a critical missing authorization vulnerability in Tenda W30e Firmware, published on 26 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-24436 in the wild and no public exploit code.

Affected product: Tenda W30e Firmware. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-24436/ (Markdown: https://insights.sbomify.com/CVE-2026-24436/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-24436
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-24436
- OSV: https://osv.dev/vulnerability/CVE-2026-24436

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-24436/
Summaries are generated and may contain mistakes; the official description above is the record.