Don't you consider SMB 1.0 as a vulnerability?
Please take a look at my response above again to clarify that I said that I did not recommend using SMB1, since it presents a significant security risk.
Having said that, I provided a possible workaround if you are willing to accept the security risks.
Even if you have the most recent "tower" shaped version of the Time Capsule, you might not be aware that it was designed and developed in the 2011-2012 timeframe and introduced in 2013. Apple has made no hardware changes or hardware improvements on the Time Capsule since it was introduced over 5 years ago.
Since Apple officially discontinued the Time Capsule earlier this year, I would be extremely surprised if they offered any additional updates for the product, so I would not look for any SMB2 or SMB3.1 support from Apple on this product.
If you need a network storage solution with up to date features, you might want to take a look at the NAS products from Synology.