TCS vehemently denied that any of their systems were compromised for the attack on M&S [1].

Perhaps they will do the same here but after some highly publicized security incidents sooner or later people will be calling a thorough independent audit of their systems.

[1] India's TCS says none of its systems were compromised in M&S hack:

https://www.reuters.com/business/media-telecom/indias-tcs-sa...