AnySign4PC Vulnerability: Why You Must Delete It Now

A few days ago, the Korea Internet & Security Agency (KISA) issued a critical security notice worth noting. It reported that a severe vulnerability has been discovered in the older versions of AnySign4PC, a program we are semi-forced to install when using public institution or bank websites in South Korea.

You might be wondering when exactly this program was installed on your PC. It typically comes from visiting government sites like the National Tax Service Hometax, Government24, and the Supreme Court Registry to handle year-end tax settlements or civil complaints. Major commercial banks such as KB Kookmin and Shinhan, as well as securities websites, also routinely require its installation when logging in with a joint certificate.

The problematic version is 1.1.5.1 and earlier. Leaving this version installed is equivalent to leaving your system’s back door wide open, allowing someone remotely to plant malicious code on your PC and execute it at will.

Normally, these security programs should shut down once your financial tasks are completed, but this program keeps running in the background the entire time your PC is turned on. Even while you are simply web surfing, there is a high likelihood that a hacker could hijack your PC’s privileges and abuse it as a transit point to attack other systems.

In fact, we now live in an era where modern web browsers’ native security features are more than sufficient. Forcing users to install executable programs that directly tamper with operating system privileges feels like outdated administrative convenience. Overseas, installing this type of program that evades browser control is treated as a serious security threat.

It is best to check the list of programs installed on your PC right now. If you see AnySign4PC in your Control Panel or Windows Settings app, make sure to check its version. If it is version 1.1.5.1 or lower, I strongly recommend deleting it without hesitation. You can always reinstall the latest version later when you actually need to do online banking.

While you put it off, thinking you will check it when you have time, automated hacking tools are likely scanning PCs with open vulnerabilities in real-time. The surest way to protect your system is to remove unnecessary risks yourself with just a few clicks.

Don’t leave any room for worry—I recommend hitting the uninstall button right now.