CVE-2026-0918
The resulting failed memory allocation triggers a NULL pointer dereference, causing the main service process to crash.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.71%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 4.0
- 7.1 HIGHCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.71% probability · 52th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- tp-link/tapo c220 firmware · tp-link/tapo c520ws firmware
- Source
- f23511db-6c3e-4e32-a477-6aa17d310630
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/Product
- https://www.tp-link.com/en/support/download/tapo-c520ws/v2/Product
- https://www.tp-link.com/us/support/download/tapo-c100/v5/Product
- https://www.tp-link.com/us/support/download/tapo-c220/v1.60/Product
- https://www.tp-link.com/us/support/download/tapo-c520ws/v2/Product
- https://www.tp-link.com/us/support/faq/4923/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.