There is an improper access control vulnerability in Huawei Share. The software does not properly restrict access to certain file from certain application. An attacker tricks the user into installing a malicious application then establishing a connect to the attacker through Huawei Share, successful exploit could cause information disclosure.

The Huawei Share function of P20 phones with versions earlier than Emily-L29C 9.1.0.311 has an improper file management vulnerability. The attacker tricks the victim to perform certain operations on the mobile phone during file transfer. Because the file is not properly processed, successfully exploit may cause some files on the victim's mobile phone are deleted.

P20 Pro, P20, Mate RS smartphones with versions earlier than Charlotte-AL00A 9.1.0.321(C00E320R1P1T8), versions earlier than Emily-AL00A 9.1.0.321(C00E320R1P1T8), versions earlier than NEO-AL00D NEO-AL00 9.1.0.321(C786E320R1P1T8) have an improper validation vulnerability. The system does not perform a properly validation of certain input models, an attacker could trick the user to install a malicious application then craft a malformed model, successful exploit could allow the attacker to get and tamper certain output data information.

There is Factory Reset Protection (FRP) bypass security vulnerability in P20 Huawei smart phones versions earlier than Emily-AL00A 9.0.0.167 (C00E81R1P21T8). When re-configuring the mobile phone using the factory reset protection (FRP) function, an attacker can login the Talkback mode and can perform some operations to access the setting page. As a result, the FRP function is bypassed.

There is a Factory Reset Protection (FRP) bypass security vulnerability in P20 Huawei smart phones versions before Emily-AL00A 9.0.0.167(C00E81R1P21T8). When re-configuring the mobile phone using the FRP function, an attacker can delete the activation lock after a series of operations. As a result, the FRP function is bypassed and the attacker gains access to the smartphone.