A zero-day (also known as a 0-day) is a vulnerability or security hole in a computer system unknown to its owners, developers or anyone capable of mitigating it. [1] Until the vulnerability is remedied, threat actors can exploit it in a zero-day exploit, or zero-day attack. [2]

The unknown or unaddressed vulnerability is referred to as a zero-day vulnerability or zero-day threat. A zero-day attack is when a malicious actor uses a zero-day exploit to plant malware, steal data or otherwise cause damage to users, organizations or systems.

Sep 9, 2024 · Zero-day exploit is a type of cyber security attack that occurs on the same day the software, hardware, or firmware flaw is detected by the manufacturer. As it’s been zero days since the security flaw was last exploited, the attack is termed a zero-day exploit or zero-day attack.

Nov 29, 2024 · A zero-day exploit (or 0-day exploit) is an attack vector through which hackers discover a previously unknown software, firmware, or hardware flaw, then use it to access personal, corporate, or government data.

A zero-day exploit, also called a zero-day threat or attack, takes advantage of a security vulnerability that does not have a fix in place.

Jun 21, 2024 · Zero-day exploits are vulnerabilities in software or hardware that are unknown to the vendor or developer, so there is no patch or fix available at the time of their discovery. A...

A zero-day attack begins with a hacker discovering a zero-day vulnerability, which is an error in code or software that the target has yet to discover. The attacker then works on a zero-day exploit, a method of attack, that they can use to take advantage of the existing vulnerability.

Apr 12, 2021 · In order to use that vulnerability to gain access to a system or its data, an attacker must craft a zero day exploit—a penetration technique or piece of malware that takes advantage of the...

Jan 17, 2025 · A Zero-Day Exploit is the technique or tactic a malicious actor uses to leverage the vulnerability to attack a system. A Zero-Day Attack occurs when a hacker releases malware to exploit the software vulnerability before the software developer has patched the flaw.

A zero-day attack happens once that flaw, or software/hardware vulnerability, is exploited and attackers release malware before a developer has an opportunity to create a patch to fix the vulnerability—hence “zero-day.”