What Business Owners Can Learn From the T-Mobile Breach

Breach News

What happened?

In March 2023, T-Mobile’s internal security measures alerted the organization that a bad actor gained access to limited information from a small number of T-Mobile accounts between late February and March 2023.

How many people were affected?

According to a notification on the website of Maine Attorney General Aaron Frey, the intrusion affected 836 customers.

No personal financial account information or call records were affected. The information 

obtained for each customer varied, but may have included full name, contact information, 

account number and associated phone numbers, T-Mobile account PIN, social security 

number, government ID, date of birth, balance due, internal codes that T-Mobile uses to 

service customer accounts (for example, rate plan and feature codes), and the number of 


What did they do right?

First and foremost, T-Mobile’s internal security measures worked as designed. By alerting the organization of unauthorized activity, it was able to respond accordingly.

To further protect affected customers, T-Mobile has done the following:

  • Proactively reset T-Mobile Account PINs
  • Offer two years of free credit monitoring and identity theft detection services

What lessons can we learn and apply?

The incident is the second hack to hit T-Mobile this year. It’s the ninth since 2018.

As the use of advanced technologies such as 5G, Internet of Things (IoT), and cloud computing grows, the range of potential cyber threats that telecommunication entities face has greatly expanded. It is therefore imperative for these organizations to implement robust and comprehensive cybersecurity measures to address the vulnerabilities created by these advancements. If there is no effort to bolster their security posture, expect breaches to reoccur. 

Failure to do so could lead to significant risks, making it critical to establish a multifaceted cybersecurity system to protect their operations and ensure the confidence of their stakeholders.

Here are several recommended practices as they strengthen their security posture:

  • conduct cybersecurity assessments and audits
  • implement a DevSecOps pipeline that fosters collaboration between development and security teams

By following these best practices, businesses and agencies can take proactive steps to protect their valuable data and prevent costly data breaches.

DevSecOps Pipeline

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