Zero-Day Exploit

Zero-day exploit is a cyberattack aimed at exploiting vulnerabilities unknown to software and antivirus vendors. Therefore, zero-day exploits can wreak havoc since no update is available to fix the vulnerabilities. These cyberattacks aim to steal data, take control of devices, and gain unauthorized access to systems and networks. Zero-day exploit attacks are used primarily by nation-states and organized crime groups.

Examples of Zero Day Exploits

Here are some real-world examples of prominent zero-day exploit cyberattacks:

• WannaCry – In 2017, WannaCry exploited a Microsoft Windows operating system vulnerability to spread and infect over 200,000 computers in over 150 countries. The attack encrypted files on victims’ computers and demanded a ransom payment in Bitcoin to decrypt them.
• Stuxnet – In 2010, Stuxnet targeted Iran’s nuclear program, exploiting some zero-day vulnerabilities in Microsoft Windows and Siemens industrial control systems to gain access to and sabotage Iran’s nuclear centrifuges.
• Log4j – In 2021, attackers exploited a vulnerability that allowed them to execute arbitrary code on vulnerable servers. Ransomware gangs and state-sponsored actors are reported to have used this vulnerability.

How to Protect Yourself from Zero-Day Exploits

Zero-day exploits can be very destructive since no update is available to fix the vulnerabilities. However, below are some ways in which you can protect yourself from zero-day exploits:

• Update software – Keep your web browser and operating system up to date, as this protects your data and network against known cyber vulnerabilities.
• Exert caution – Be weary of suspicious links, images, URLs, or websites because they can contain malware. Zero-day exploits are often delivered via phishing emails.
• Protect yourself – Use a security solution that includes zero-day protection, including web filtering and virus protection, that prevents malicious activity from infecting your computer, and a firewall.