7-Zip libraries are commonly used in third party applications, like… antivirus. So, your antivirus can scan your .png files, try to uncompress them as rar (bas

7-Zip libraries are commonly used in third party applications, like… antivirus. So, your antivirus can scan your .png files, try to uncompress them as rar (based on their content) and execute malicious code without you having even the slightest idea of what is happening.