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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| TP-Link Systems | Tapo C220 v1 | < 1.4.2 Build 251112 | 1.4.2 Build 251112 |
| TP-Link Systems | Tapo C520WS v2 | < 1.2.3 Build 251114 | 1.2.3 Build 251114 |
| TP-Link Systems | Tapo C100 v5 | < 1.4.3 Build 251128 | 1.4.3 Build 251128 |
References
- https://www.tp-link.com/us/support/download/tapo-c220/v1.60/ patch
- https://www.tp-link.com/en/support/download/tapo-c220/v1/ patch
- https://www.tp-link.com/us/support/download/tapo-c520ws/v2/ patch
- https://www.tp-link.com/en/support/download/tapo-c520ws/v2/ patch
- https://www.tp-link.com/us/support/faq/4923/ vendor-advisory
- https://www.tp-link.com/us/support/download/tapo-c100/v5/ patch
- https://www.crac-learning.com/post/smart-home-security-research-cve-2026-0918-assigned third-party-advisory