The Telecom Component in Android 5.0.x before 5.0.2, 5.1.x before 5.1.1, and 6.x before 2016-04-01 allows attackers to spoof the originating telephone number of a call via a crafted application, as demonstrated by obtaining Signature or SignatureOrSystem access, aka internal bug 26864502.
Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.