Race Condition in the Directory Validation Logic in the TeamViewer Full Client and Host prior version 15.69 on Windows allows a local non-admin user to create arbitrary files with SYSTEM privileges, potentially leading to a denial-of-service condition, via symbolic link manipulation during directory verification.
The product checks the state of a resource before using that resource, but the resource’s state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state.