I don't think that applies here. The trust store contains the _root_ certificate, not these intermediates.

The main eMudhra root cert backing these intermediates is "emSign ECC Root CA - G3", which was issued back in 2018 and was widely trusted for TLS way before these intermediates were created. The certs were also cross-signed by Sectigo using their "AAA Certificate Services" which was issued in 2004 (!!!) and was trusted in TLS stores until 2025 (after that it got removed/demoted to email signing only, depending on the store).

Everything which trust one of those roots will trust the intermediates (putting aside revocation, CT checks, lack of ECC support, etc) so the window is much much longer. The AAA does expire at the end of 2028 though!

Of all the places for what is otherwise eMudhra's epic fail, various MCUs was the one place I thought perhaps there'd be some silver lining. Some interesting and good, for the hackers: to get to have some chance to see what their devices are doing, to man-in-the-middle those conversations home those devices in our homes are doing, and see what they are saying.

This fact alone though makes that very unlikely.