Concepts
Zero-day
In Turkish: Sıfırıncı gün (zero-day)
A security flaw that attackers use before the maker knows about it or has released a fix.
The name comes from the maker having had zero days to fix it. They are rare, valuable and mostly aimed at specific, important targets rather than ordinary people.
You cannot prevent them, but you can shorten your exposure: install updates quickly as soon as a fix appears, and keep fewer apps and features switched on.
What to do
- Install security updates as soon as they appear.
- Keep fewer apps and browser extensions installed.
- Do not worry about the term; the habit of updating is the answer.