Nollapäivän

Nollapäivän is a Swedish term that translates to "zero day" in English. It most commonly refers to a zero-day exploit, which is a vulnerability in a software program or hardware that is unknown to the vendor or developer. This means that there is no patch or fix available to address the security flaw, making it a prime target for attackers.

When a zero-day vulnerability is discovered and exploited before the vendor becomes aware of it, it can be used to gain unauthorized access to systems, steal data, or deploy malicious software. The term "zero day" signifies that the developers have had zero days to prepare a defense against the exploit.

The existence of zero-day exploits poses a significant challenge to cybersecurity professionals. Organizations and individuals must rely on other security measures, such as intrusion detection systems and robust endpoint protection, to mitigate the risks associated with these unknown threats. The market for zero-day exploits is often associated with both state-sponsored espionage and the criminal underground, where such vulnerabilities can be highly valuable.