CVE-2026-0918
Null Pointer Dereference in Tapo SmartCam HTTP Service on TP-Link Tapo C220 & C520WS
- State
- Published
- Severity
- 7.1 High
- Published
- Jan 27, 2026
- Updated
- Apr 29, 2026
- Reserved
- Jan 13, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | 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 | TPLink |
Weaknesses
- CWE-476 NULL Pointer Dereference
Affected Products
| Product | Versions |
|---|---|
Tapo C220 v1TP-Link Systems Inc. |
|
Tapo C520WS v2TP-Link Systems Inc. |
|
Tapo C100 v5TP-Link Systems Inc. |
|
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-assignedthird-party-advisory
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