Home / News

New Research Reveals Over 340 Million Accounts Compromised in the First Four Months of 2023

Recent research conducted by the Independent Advisor reveals that a significant number of accounts, exceeding 340 million, have been compromised due to business data breaches within the first four months of 2023. Notably, Twitter experienced the largest breach this year, impacting approximately 235 million user accounts.

Frequency and Impact of Cyberattacks: Cyberattacks continue to occur at alarming rates, with a hacker attack transpiring every 39 seconds. Notably, 2023 has witnessed several high-profile cybersecurity incidents, including both new attacks and recurring ones from previous years. The healthcare sector, in particular, has suffered significant data leaks, impacting smaller companies. Such breaches have resulted in data exposure, financial losses, legal ramifications, and reputational damage for targeted organizations.

Prevalence of Data Breaches: IBM Security’s Cost of a Data Breach Report for 2022 reveals that 83% of organizations have experienced multiple breaches. Disturbingly, between March 2021 and February 2022, approximately 42 million records were exposed due to data breaches. These compromised records encompass a wide range of sensitive information, from personal details like names and email addresses to more critical data such as passport copies, healthcare information, and financial details.

Delayed Detection and Containment: Data breaches are taking longer to detect and contain compared to previous years, especially those related to ransomware. In 2021, ransomware-related breaches required an additional 49 days on average to address compared to previous years. The common assumption that organizations lacking a dedicated cybersecurity team are more susceptible to data leaks has been debunked by incidents like the recent Twitter cyberbreach. Even companies with robust cybersecurity measures are not immune to skilled hackers.

Summary of Notable Data Breaches in 2023: In 2023, Independent Advisor researchers have identified several significant data breaches resulting in the exposure of 346,758,345 records. These breaches range from compromises of basic personally identifiable information (PII), such as names, addresses, dates of birth, and phone numbers, to incidents involving more sensitive data, including social security numbers, financial information, and healthcare records. Noteworthy breaches include Twitter, with an alleged leak of 235 million emails, JD Sports in the UK, affecting 10 million customers, and T-Mobile in the US, impacting 37 million customers.

By CircleID Reporter

CircleID’s internal staff reporting on news tips and developing stories. Do you have information the professional Internet community should be aware of? Contact us.

Visit Page

Filed Under


Comment Title:

  Notify me of follow-up comments

We encourage you to post comments and engage in discussions that advance this post through relevant opinion, anecdotes, links and data. If you see a comment that you believe is irrelevant or inappropriate, you can report it using the link at the end of each comment. Views expressed in the comments do not represent those of CircleID. For more information on our comment policy, see Codes of Conduct.

CircleID Newsletter The Weekly Wrap

More and more professionals are choosing to publish critical posts on CircleID from all corners of the Internet industry. If you find it hard to keep up daily, consider subscribing to our weekly digest. We will provide you a convenient summary report once a week sent directly to your inbox. It's a quick and easy read.

I make a point of reading CircleID. There is no getting around the utility of knowing what thoughtful people are thinking and saying about our industry.

Co-designer of the TCP/IP Protocols & the Architecture of the Internet



Threat Intelligence

Sponsored byWhoisXML API

Brand Protection

Sponsored byCSC


Sponsored byDNIB.com

IPv4 Markets

Sponsored byIPv4.Global

Domain Names

Sponsored byVerisign


Sponsored byVerisign

New TLDs

Sponsored byRadix