The default themes were updated with WordPress 4.9.6.
- Twenty Ten to version 2.5
- Twenty Eleven to version 2.8
- Twenty Twelve to version 2.5.
- Twenty Thirteen to version 2.4
- Twenty Fourteen to version 2.2
- Twenty Fifteen to version 2.0
- Twenty Sixteen to version 1.5
- Twenty Seventeen to version 1.6