First of all, I wouldn't do that in the ongoing meeting. I'd rather catch him/her up after and have a word about that. I would try to keep this conversation in a friendly tone.
I would inform this person to stick with the facts on stand ups and to remember that we should fit into a narrow time window during whole meeting.
After all, we are all humans, and this is probably your colleague, so keep that in mind :)
For further actions, you may consider blocking this person and/or reporting abuse
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Do you have some tips how to kindly inform someone who talk too long to finish his/her speech?
<name> thanks for your updates - can we catch up outside of this meeting as we need to keep to our 15 minutes and others are yet to contribute :)
First of all, I wouldn't do that in the ongoing meeting. I'd rather catch him/her up after and have a word about that. I would try to keep this conversation in a friendly tone.
I would inform this person to stick with the facts on stand ups and to remember that we should fit into a narrow time window during whole meeting.
After all, we are all humans, and this is probably your colleague, so keep that in mind :)