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The TKsetdeviceModelreqhandle function in the cloud communication component in Guardzilla GZ621W devices with firmware 0.5.1.4 has a Buffer Overflow.
The remote upgrade feature in Guardzilla GZ180 devices allow command injection via a crafted new firmware version parameter.
The Cloud API on Guardzilla smart cameras allows user enumeration, with resultant arbitrary camera access and monitoring.
A reliance on a static, hard-coded credential in the design of the cloud-based storage system of Practecol's Guardzilla All-In-One Video Security System allows an attacker to view the private data of all users of the Guardzilla device.