A security vulnerability in .lnk shortcuts, which triggers malware downloads, has been known by Microsoft since 2017.
The vulnerability has been exploited since at least 2017, with attacks originating from North Korea, China, Russia, and Iran.
The majority of attacks are state-sponsored and target governments, critical infrastructure, private organizations, think tanks, and the financial sector.
Microsoft has classified the issue as low severity and has not taken action to patch it.