HomeLatest NewsCyber SecurityGenetic testing firm 23andMe hit by big data breach, over 4 million ancestral profiles exposed

Genetic testing firm 23andMe hit by big data breach, over 4 million ancestral profiles exposed

23andMe is among the leading direct-to-consumer genetic testing services which recently came under the scanner due to this severe data exposure.

Preferred Source of Google

In a staggering cyber data theft, over four million individuals have had their ancestral information leaked, marking a significant breach in 23andMe’s . 23andMe is among the leading direct-to-consumer genetic testing services which recently came under the scanner due to this severe data exposure.

The culprit, a named Golem, is no stranger to 23andMe’s database. Golem had previously made headlines for leaking a sample of private user data from the genetic testing giant. This time around, the hacker has upped the ante by exposing a colossal amount of data, with hints at more leaks in the offing.

The leaked data, comes in two significant chunks. One part of the data comprises over four million individuals, with a majority allegedly hailing from the United Kingdom. The other part has details of over 100,000 individuals from . Golem’s audacious claim to have included “the wealthiest people living in the US and Western Europe” in this leak further magnifies the severity of the situation.

Advertisement
Saksham Bharat 2026
Saksham Bharat 2026
A multi-stakeholder dialogue on skilling gap in Cybersecurity, Data Resilience and AI — and the roadmap to a Saksham Bharat.
Register Now →
VeeamON 2026 Tour India - Mumbai
VeeamON 2026 Tour India - Mumbai
A VeeamON 2026 India Leadership Series Mumbai for senior public sector and government technology leaders.
Register Now →
Cyber Surakshit Uttar Pradesh
Cyber Surakshit Uttar Pradesh
Find out strategies, frameworks and solutions for building a resilient and secure digital ecosystem across Uttar Pradesh.
Register Now →
VeeamON 2026 Tour India - Bengaluru
VeeamON 2026 Tour India - Bengaluru
A VeeamON 2026 India Leadership Series Bengaluru for senior public sector and government technology leaders.
Register Now →
VeeamON 2026 Tour India - Delhi
VeeamON 2026 Tour India - Delhi
A VeeamON 2026 India Leadership Series Delhi for senior public sector and government technology leaders.
Register Now →
Infosec Reimagined
Infosec Reimagined
Infosec Reimagined 2026 is the premier information security summit where top leaders—CISOs, CROs, CIOs, CTOs and risk executives—converge to redefine cyber resilience.
Register Now →
Digital Senate
Digital Senate
Digital Senate is a premier conference uniting government leaders, technologists and innovators to share ideas, success stories and strategies on digital governance, public sector transformation, cybersecurity and emerging technologies in India.
Register Now →
CIO Prism
CIO Prism
CIO Prism unites forward-thinking technology leaders to exchange transformative insights, shape digital strategies, and foster innovation, empowering enterprises to excel in an era of rapid technological change.
Register Now →

This leak follows a familiar yet alarming pattern, with the data revealing critical personal information such as names, sex, age, and location, alongside ancestral markers like lineage, yDNA, and mtDNA haplogroups which trace paternal and maternal ancestry. However, the authenticity of the data remains unverified as reports.

According to reports, the hacker boasted about having accessed data of 7 million 23andMe users, although, at the moment, only a fraction of that claim has been exposed. Specifically, Golem mentioned sharing just “1/3 of the profiles with German origins from the DB.”

23andMe, on its part, has been swift in addressing the issue, although it denies any incidents within its systems. Previously, the company had attributed such leaks to credential stuffing attacks, a tactic that reuses credentials from other breaches. The recent statement from a 23andMe spokesperson reiterated a similar stance, suggesting the breach resulted from customers who recycled login credentials used on other hacked websites.

Advertisement

As a preventive measure, 23andMe has notified its customers, urging a password reset and advising the activation of multi-factor authentication. The company is also collaborating with external forensic experts and federal law enforcement in an ongoing investigation.

23andMe, headquartered in San Francisco, is a recognised name in the world of personal genomics and , providing direct-to-consumer DNA testing services. The company, which boasts over 12 million DNA test kits sold, is now in the eye of a storm that questions the security of genetic data.

The aftermath of this breach is already visible on 23andMe’s share prices which plummeted almost 10% in a single day, now down by 62% since the beginning of the year.

Advertisement

Golem criticized the lax security measures of 23andMe, highlighting the absence of essential verification steps such as Captcha and email verification for downloading raw data. The hacker further taunted 23andMe for its inability to notice the unauthorized access despite the large scale data extraction.

Get the day's headlines from Tech Observer straight in your inbox

By subscribing you agree to our Privacy Policy, T&C and consent to receive newsletters and other important communications.
Tech Observer Desk
Tech Observer Desk
Tech Observer Desk at TechObserver.in is a team of technology reporters led by a senior editor who brings latest updates and developments from the world of technology.
- Advertisement -
Powered By Veeam Logo
- Advertisement -

Subscribe to our Newsletter

By subscribing you agree to our Privacy Policy, T&C and consent to receive newsletters and other important communications.
- Advertisement -

CPGRAMS grievance pendency rises to 2.11 lakh despite 77,445 disposals in April

India's public grievance pendency rose to 2,11,701 cases by April 2026 despite states disposing of 77,445 complaints. Citizen feedback shows 36 per cent dissatisfaction with resolved cases.

RELATED ARTICLES