aktuell
current
Referring to the present; happening at the moment, relevant, or of interest.
Die aktuellen Nachrichten berichten über das Wahlergebnis.
The current news reports on the election result.

current
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current
Referring to the present; happening at the moment, relevant, or of interest.
Die aktuellen Nachrichten berichten über das Wahlergebnis.
The current news reports on the election result.

'Aktuell' (current) means 'present' or 'important right now.' It is a very common mistake to confuse it with the English word 'actually,' which means 'tatsächlich' or 'eigentlich' in German.
Was sind die aktuellen Kinofilme?
What are the current movies in theaters?
'Aktuell' (currently) can also be used as an adverb at the beginning or in the middle of a sentence. It then means 'at present' or 'at the moment' and describes when something is happening.
Aktuell haben wir keine freien Stellen.
Currently, we have no open positions.
As an adjective, 'aktuell' (current) often describes things that change quickly or are relevant to the present. Typical nouns are: the current situation, current information, a current topic, or current data.
Für meine Präsentation brauche ich aktuelle Zahlen.
For my presentation, I need current figures.
today
'heute' and 'aktuell' both refer to the present. 'heute' is an adverb and means either the current day or the present time in a broader sense. 'aktuell' is an adjective and describes something that is valid, important, or new at the moment. It is easy to confuse the words because both have to do with 'jetzt' (now). But for a specific day, you say 'heute'. For information, topics, or situations that are currently valid, 'aktuell' is usually a better fit.

Für die Bewerbung brauche ich einen aktuellen Lebenslauf.
For the application, I need a current CV.
Heute bleibt das Büro wegen einer Besprechung länger geschlossen.
Today the office will stay closed longer because of a meeting.