A security flaw in Skype’s updater process can allow an attacker to gain system-level privileges to a vulnerable computer.
The bug, if exploited, can escalate a local unprivileged user to the full “system” level rights — granting them access to every corner of the operating system.
But Microsoft, which owns the voice- and video-calling service, said it won’t immediately fix the flaw, because the bug would require too much work.
Security researcher Stefan Kanthak found that the Skype update installer could be exploited with a DLL hijacking technique, which allows an attacker to trick an application into drawing malicious code instead of the correct library.
Skype is losing market share and this is just making it worse.