Zero-day Meaning

Example : 2003, John Viega, Matt Messier, Secure Programming Cookbook for C and C++  If your software is popular and has a high demand, you will want to defend against the "zero-day" cracker.2014, Michael Gregg, CASP CompTIA Advanced Security Practitioner Study Guide: Exam CAS-002  Before discussing ways to counter zero-day attacks, let's begin with the definition of what a zero-day attack is. A zero-day attack is one that the vendor does not yet know about or hasn't been fixed.2005, Valdes et al, Recent Advances in Intrusion Detection  Automatically creating reliable signatures of zero-day exploits is the focus of intense research efforts.Used other than as an idiom: see zero,‎ day.  Average residues of 1.44 and 2.18 mg/kg chlortetracycline were seen in liver and kidney, respectively, at zero-day withdrawal.