Nollapäivähaavoja

Nollapäivähaavoja, also known as zero-day vulnerabilities, refers to a cybersecurity exploit that takes advantage of a flaw in a computer system, network, or software that is unknown to the vendor or developer. Because the vendor is unaware of the vulnerability, there are no patches or defenses available to fix it, making it a "zero-day" opportunity for attackers.

These vulnerabilities can be discovered by malicious actors or security researchers. If discovered by attackers, they can be used for various purposes, including gaining unauthorized access to systems, stealing sensitive data, deploying malware, or disrupting services. The value of a zero-day vulnerability in the black market can be very high due to its effectiveness and the lack of immediate countermeasures.

Once a zero-day vulnerability is discovered and exploited, security vendors work to develop and release patches to close the security hole. The period between the initial exploitation and the release of a patch is when systems are most vulnerable. Information about zero-day exploits is often kept confidential until a patch is ready to prevent widespread misuse. The development and use of zero-day exploits is a significant concern in cybersecurity, driving continuous efforts in threat detection and vulnerability management.