What’s Vulnerable › Vulnerabilities

CVE-2026-0918: Null Pointer Dereference in Tapo SmartCam HTTP Service on TP-Link Tapo C220 & C520WS

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-27 · updated 2026-06-17
• Weakness: CWE-476

Description

The Tapo C100 v5, C220 v1 and C520WS v2 cameras’ HTTP service does not safely handle POST requests containing an excessively large Content-Length header. The resulting failed memory allocation triggers a NULL pointer dereference, causing the main service process to crash. An unauthenticated attacker can repeatedly crash the service, causing temporary denial of service. The device restarts automatically, and repeated requests can keep it unavailable.

Affected products

• TP-Link Tapo C220 Firmware: before 1.4.2 — fixed in 1.4.2
• TP-Link Systems Inc. Tapo C520WS v2: before 1.2.3 — fixed in 1.2.3

How to fix

Upgrade to a fixed version: TP-Link Tapo C220 Firmware 1.4.2; TP-Link Systems Inc. Tapo C520WS v2 1.2.3. Check the vendor advisory for mitigations.

References

• https://www.crac-learning.com/post/smart-home-security-research-cve-2026-0918-assigned
• https://www.tp-link.com/en/support/download/tapo-c220/v1/
• https://www.tp-link.com/en/support/download/tapo-c520ws/v2/
• https://www.tp-link.com/us/support/download/tapo-c100/v5/
• https://www.tp-link.com/us/support/download/tapo-c220/v1.60/
• https://www.tp-link.com/us/support/download/tapo-c520ws/v2/
• https://www.tp-link.com/us/support/faq/4923/

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