Kabuto's ninja rank

[Brutus]

On Narutopedia, it states that Kabuto is officially a genin and "acquired" the rank while being a spy in the chunin exams, but now we know that he was involved with Root long before, so shouldn't he be an ANBU?

 

[Bijuu mode naruto]

NARUTO IS GENIN and he stronger each of the current kage

 

[saaaaaadpanda]

ANBU isn't a rank. Also, in his capacity as a super spy, he wasn't officially associated with ANBU.

 

[King Cobra]

To me he is on jonin level
Remember naruto is a genin to but however he is on kage level

 

[Sir Blades]

he is probably high jonin or low low hokage.

 

[Tenshi Uchiha]

if you want proper ranking he is missing nin just like everyone else who is.
edit: but he would be considered a jonin level missing nin

 

[Amegakure Madoka Rikuto]

Kabuto was probably a Jonin.

 

[hawaiianmike]

According to Narutopedia he can be classified as the following three.
Medical-nin
Missing-nin
Sage
Hope this suffices as an answer for you.

 

[IzunaUchiha2]

Sage
Medical
Mssing nin

 

[ramplevel]

As far as rank goes, he didn't even legitimately get the gennin rank. He basically has no official rank. He is comparable to a few higher ninja ranks but holds no rank.