https://www.bleepingcomputer.com/news/security/f-secure-fixes-serious-vulnerability-in-antivirus-products/

F-Secure has fixed a severe vulnerability in its home and enterprise antivirus products that could have allowed an attacker to execute malicious code on the user's machine and take over affected PCs

The actual vulnerability doesn't affect F-Secure directly, but the 7-Zip file archiving software, which F-Secure uses to decompress archives, scan them for threats, and repackage the original file.