Target Corp.  has confirmed that a network intrusion may have exposed approximately 40 million debit and credit card accounts. U.S. point-of-sale transactions conducted between Nov. 27 and Dec. 15 were likely affected.  According to Target, authorities and financial institutions were alerted immediately after the retailer was made aware of the unauthorized access. Target is partnering with a leading third-party forensics firm to conduct a thorough investigation of the incident.
If you suspect unauthorized activity please contact Texas Regional Bank immediately and contact Target at 866-852-8680.  Here are the FAQs Target released: 
 

•  How do I know if this impacts me?  If you shopped at Target between Nov. 27 and Dec. 15, you should check your account for any suspicious or unusual activity. If you see something that appears fraudulent, REDcard holders should contact Target, others should contact their bank.

 

• If I shopped at Target.com or in Canada should I be concerned?  No, this was an issue that impacted US stores.

 

• Can I still use my card at Target?  Yes you can, if you used your card during the impacted periods, you should continue to monitor your accounts.

 

• Has the issue been resolved?  Yes, Target moved swiftly to address this issue so guests can shop with confidence. We have identified and resolved the issue of unauthorized access to payment card data. The issue occurred between Nov. 27 and Dec. 15 and guests should continue to monitor their accounts.

 

• How can I be assured you are taking the steps to protect my information in the future?  We continue to invest in our security practices to protect our guests’ information including the retention of a leading third party forensics firm to conduct a thorough investigation of this incident. We apologize for any inconvenience this has caused our guests.

 

• Is the CVV code the same as the three-digit code on the back of my card?  No, the CVV code is not the same as the security code on the back of your card.  As of now, we have no indication that the three-digit code on the back of the card has been impacted. 

 

• If I call you, what are your hours of operation? Agents are available to take calls from 7am to 11pm daily