CVE-2026-9032: Unauthenticated Onboarding Connect NULL Pointer Dereference Denial of Service Vulnerability in TP-Link Tapo C120 & C200

Severity: high (CVSS 7.1 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-01 · updated 2026-10-06
Weakness: CWE-476

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.

Affected products

TP-Link Systems Inc. Tapo C120 v1: before V1_1.9.4 Build 260813 Rel.79754n — fixed in V1_1.9.4 Build 260813 Rel.79754n
TP-Link Systems Inc. Tapo C200 v5: before V5_1.4.6 Build 260709 Rel.27675n — fixed in V5_1.4.6 Build 260709 Rel.27675n

How to fix

Upgrade to a fixed version: TP-Link Systems Inc. Tapo C120 v1 V1_1.9.4 Build 260813 Rel.79754n; TP-Link Systems Inc. Tapo C200 v5 V5_1.4.6 Build 260709 Rel.27675n. Check the vendor advisory for mitigations.

References

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