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.
CVSS breakdown
CVSS 4.0
Attack Vector
Adjacent
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality (Vulnerable System)
None
Integrity (Vulnerable System)
None
Availability (Vulnerable System)
High
Confidentiality (Subsequent System)
None
Integrity (Subsequent System)
None
Availability (Subsequent System)
None
Affected products
- TP-Link Systems Inc. / Tapo C100 v50 – 1.4.3 Build 251128
- TP-Link Systems Inc. / Tapo C220 v10 – 1.4.2 Build 251112
- TP-Link Systems Inc. / Tapo C520WS v20 – 1.2.3 Build 251114
References
- MISChttps://www.tp-link.com/us/support/download/tapo-c220/v1.60/
- MISChttps://www.tp-link.com/en/support/download/tapo-c220/v1/
- MISChttps://www.tp-link.com/us/support/download/tapo-c520ws/v2/
- MISChttps://www.tp-link.com/en/support/download/tapo-c520ws/v2/
- MISChttps://www.tp-link.com/us/support/faq/4923/
- MISChttps://www.tp-link.com/us/support/download/tapo-c100/v5/
- MISChttps://www.crac-learning.com/post/smart-home-security-research-cve-2026-0918-assigned