T-Mobile Company Cyber Security Posture

Description: T-mobile company suffered a significant data breach in a cyber attack in December 2021. The customers fell prey to the attacker and suffered SIM swapping attacks and exposed personal information like personal plan information, billing account name, phone and account number, and others. Around 50 million customers' data was compromised in the breach.

Description: The account information of an undisclosed number of customers of T-mobiles was breached by an unauthorized third-party. The accessed data included name and billing address, phone number, account number, rate plan and features, such as whether you added an international calling feature all related to prepaid service account. T-mobile alerted all impacted customers via SMS notifications and shut down malicious, unauthorized access to some information related to your T-Mobile prepaid wireless account.

Description: T-Mobile USA suffered a data breach incident after its cyber-security team discovered unauthorized access to its customers' data. An attacker exfiltrated personal data such as customer names, billing ZIP codes, phone numbers, email addresses, account numbers, and account types (prepaid or postpaid). However, he did not gain access to passwords, social security numbers, or any financial information. T-mobile notified that 3% of its customers were affected by the attack.

Description: T-Mobile suffered a data breach caused after an email vendor was hacked in an incident that exposed the personal and financial information of some of its customers. Some of the compromised email accounts contained T-Mobile customer information such as social security numbers, financial information, government ID numbers, billing information, and rate plans. T-Mobile notified the affected customers affected by sending text messages and identified and shut down a security event involving account information. T-Mobile also offered a free two-year subscription to my true identity online credit monitoring service for those whose financial information was exposed.

Description: T-Mobile suffered another breach incident that affected around 37 million customers. The stolen data included addresses, phone numbers, and dates of birth. The carrier has no evidence (at least so far) that any passwords, pins, bank account, credit card information, or Social Security numbers.

Description: Threat actors gained access to the private data of 100 of customers of T-Mobile beginning in late February 2023 as a result of the second data breach of 2023. Only 836 clients, in total, were affected by the security compromise. The company claims that the security breach had no impact on call history or information from personal bank accounts. Depending on the customer, different information was obtained, but it could have included the following: full name, contact information, account number and related phone numbers, T-Mobile account PIN, social security number, government-issued ID, date of birth, balance owing, internal codes used by T-Mobile to service customer accounts (such as rate plan and feature codes), and the number of lines.

Description: In 2023, T-Mobile disclosed its second data breach of the year, affecting 836 customers, following an earlier breach that compromised approximately 37 million customers. T-Mobile, a well-known telecommunications company, faced significant security and privacy scrutiny due to these incidents. The breaches exposed customers' personal data, such as contact information and sensitive account details, putting them at risk of identity theft and fraud. The first breach's extensive impact and the subsequent discovery of another vulnerability reveal challenges in T-Mobile's cybersecurity measures and response strategies. These events highlight the critical importance of robust security protocols and rapid response mechanisms in protecting customer data against the evolving threat landscape in the telecommunications industry.

Description: In August 2021, T-Mobile experienced a significant cybersecurity breach, resulting in the theft of data from about 50 million existing and potential customers. The information compromised included customer addresses, drivers' licenses, and social security numbers. This breach was orchestrated by a 21-year-old who claimed to have accessed approximately 106GB of T-Mobile's data. The exposure of such sensitive personal information potentially puts millions of individuals at risk of identity theft and fraud, raising serious privacy and security concerns.

Description: T-Mobile, a major telecom service provider with contracts across various divisions of the US Department of Defense, including the Army, Air Force, and Navy, encountered attempts of hacking activity through its routing infrastructure. Although the company has not confirmed that the attack was the Salt Typhoon espionage campaign, it identified and mitigated the intrusion attempts. Despite this, vulnerabilities remain in the telecom infrastructure. Senators are urging the DOD to renegotiate contracts to strengthen cybersecurity defenses, pointing out the risks of surveillance and potential espionage.

Description: The California Office of the Attorney General reported a data breach involving T-Mobile US on December 30, 2013. The breach involved unauthorized access to a file stored on servers managed by a T-Mobile supplier, potentially exposing personal information such as names, addresses, Social Security numbers, and/or Driver’s License numbers. The date of the breach discovery was in late November 2013.

Description: The Maine Office of the Attorney General reported a data breach involving T-Mobile, USA on April 28, 2023. The breach occurred between February 24, 2023, and March 30, 2023, affecting 836 individuals in total, including one resident in Maine. The breach resulted from external system hacking and involved compromised T-Mobile account PINs and other personal information, including driver's license numbers.

Description: The California Office of the Attorney General reported on October 1, 2015, that T-Mobile USA, Inc. experienced a data breach on September 14, 2015, involving unauthorized access to Experian servers. The breach potentially exposed personal information of customers, including names, addresses, social security numbers, and dates of birth, but no banking or payment information was compromised.

Description: The Washington State Office of the Attorney General reported that T-Mobile USA experienced an unauthorized access data breach affecting 772,593 individuals. The breach occurred between November 25, 2022, and January 5, 2023, potentially exposing customer names, full dates of birth, and other account information, but not passwords, payment methods, or Social Security numbers.

Description: The California Office of the Attorney General reported on August 25, 2021, that T-Mobile USA experienced a data breach on July 22, 2021, involving the unauthorized access of personal customer information. The breach potentially affected data such as names, drivers’ licenses, Social Security numbers, and dates of birth among others, although the specific number of individuals impacted is unknown.

Description: T-Mobile faced a series of high-profile data breaches dating back to 2021, resulting in the unauthorized exposure of **customers’ personally identifiable information (PII)**, including Social Security numbers, email addresses, and other sensitive data. The breaches violated the FCC’s updated 2024 regulations, which mandate reporting incidents involving **500+ customers’ PII within seven business days**. The company was penalized with a **$31.5 million fine** and forced to overhaul its cybersecurity practices as part of a settlement with the FCC. The breaches compromised **customer trust**, exposed critical personal data to potential misuse (e.g., identity theft, fraud), and highlighted systemic vulnerabilities in T-Mobile’s data protection frameworks. The FCC’s enforcement underscored the severity of failing to safeguard PII, particularly under stricter regulatory scrutiny. The incident aligns with broader industry trends where telecom providers face escalating legal and financial repercussions for inadequate breach responses.

Description: T-Mobile customers are being targeted by ongoing phishing campaign. The hackers are using malicious links with unblockable texts sent via SMS (Short Message Service) group messages. The attacker are using the data breached form the company in the past. The NJCCIC warned the customers to be alerted of any suspicious activity.

Description: T-mobile company suffered a significant data breach in a cyber attack in August 2022. A former owner of a T-Mobile retail store in Eagle Rock was guilty of 14 federal criminal charges related to his $25 million scheme to enrich himself by stealing T-Mobile employee credentials and unlawfully accessing the company's internal computer systems to illicitly "unlock" and "unblock" cellphones. Around 25 million customers' data was compromised in the attack.

Description: T-Mobile experienced attempted hacking activities through its routing infrastructure from an unnamed compromised wireline partner. While T-Mobile's security investments, like implementing mandatory two-factor authentication with physical security keys, have significantly enhanced its cybersecurity posture, the underlying vulnerabilities within US telecom systems remain. The incident, linked to the Salt Typhoon espionage campaign, did not result in a breach but highlights the persistent security challenges facing the telecom industry.

Description: A cybercriminal has admitted to hacking businesses like Uber, Sainsbury's, and Groupon to sell customers' personal information on the dark web. The other targets included Nectar, T-Mobile, Asda, Ladbrokes, Coral, and Argos. The data comprised all the information required to complete an online purchase and was then promoted and sold to clients through his dark website. The firm is thought to have lost more than £200,000 due to the theft, although no financial data was collected. West pleaded guilty to two counts of conspiring to defraud, one count of hacking a computer, four counts of possessing and supplying marijuana, two counts of having criminal property, and one crime of money laundering Bitcoins. The leaked data is related to a security breach on a third-party vendor.

Description: T-Mobile experienced its second data breach of 2023; 100 of consumers' personal information was exposed to threat actors. The security incident only affected 836 customers, which is a small number. Personal bank account information and call history, according to the carrier, were unaffected by the security lapse. Each customer's information was collected differently, but it could have included their full name, contact information, account number and related phone numbers, T-Mobile account PIN, social security number, government-issued ID, date of birth, balance due, and internal T-Mobile service account servicer codes, as well as the number of lines. They can get free credit monitoring and identity theft detection services from T-Mobile for two years.

Description: There was a vulnerability found. T-Mobile classified it as “critical,” patched the bug and gave the researcher a $5,000 reward. Hackers accessed customers’ sensitive information such as email addresses, billing account numbers, and their IMSI, the phone’s standardized unique number that identifies subscribers. They also hijacked their phone numbers and tried stealing money from their banking accounts linked to those numbers.