zero-day malware

Zero-day malware refers to malicious software that exploits vulnerabilities in computer systems or software that are unknown to the vendor or maker. This means there are "zero days" between the discovery of the vulnerability and its exploitation, leaving users unprotected as no patches or fixes are available.1

Malware, a combination of "malicious" and "software," encompasses various threats like viruses, spyware, and worms. Cybercriminals use it to steal data, extort money, or spy on victims. Zero-day exploits are particularly dangerous because they bypass existing security measures, making them a potent tool for cyberattacks.21