Microsoft Skype through 8.59.0.77 on macOS has the disable-library-validation entitlement, which allows a local process (with the user's privileges) to obtain unprompted microphone and camera access by loading a crafted library and thereby inheriting Skype Client's microphone and camera access.

Untrusted search path vulnerability in the installer of Skype for Windows allows an attacker to gain privileges via a Trojan horse DLL in an unspecified directory.

Untrusted search path vulnerability in Skype for Windows allows an attacker to gain privileges via a Trojan horse DLL in an unspecified directory.

Multiple untrusted search path vulnerabilities in Microsoft Skype allow local users to execute arbitrary code and conduct DLL hijacking attacks via a Trojan horse (1) msi.dll, (2) dpapi.dll, or (3) cryptui.dll that is located in the current working directory.