Experts found an unsecured 16TB database containing 4.3B professional records

Security Affairs

December 14, 2025 at 8:56 AM

Overview

A significant security oversight was uncovered when researchers found an unsecured 16TB MongoDB database that exposed approximately 4.3 billion professional records. This database primarily contained LinkedIn-style data, which could be exploited for large-scale AI-driven social engineering attacks. The discovery was made by Bob Diachenko and nexos.ai on November 23, 2025, and the database was secured only after the researchers alerted its owner. This incident underscores the risks associated with unsecured databases, as the exposed data could facilitate identity theft and phishing schemes targeting professionals. Organizations need to ensure better security measures for their data to prevent such breaches in the future.

Key Takeaways

Affected Systems: Unsecured MongoDB database, professional records, LinkedIn-style data
Action Required: Database secured after researcher notification; organizations should implement strict access controls and regular security audits.
Timeline: Disclosed on November 23, 2025

Original Article Summary

An open 16TB database exposed 4.3B professional records. It was unsecured and only closed after researchers alerted the owner. A 16TB unsecured MongoDB database exposed about 4.3 billion professional records, mainly LinkedIn-style data, enabling large-scale AI-driven social-engineering attacks. The researcher Bob Diachenko and nexos.ai discovered the unsecured DB on November 23, 2025, and it was […]

Impact

Unsecured MongoDB database, professional records, LinkedIn-style data

Exploitation Status

No active exploitation has been reported at this time. However, organizations should still apply patches promptly as proof-of-concept code may exist.

Timeline

Disclosed on November 23, 2025

Remediation

Database secured after researcher notification; organizations should implement strict access controls and regular security audits.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Phishing, Data Breach, LinkedIn, and 1 more.

Read Original Article

Related Coverage

Microsoft disrupts massive RedVDS cybercrime virtual desktop service

BleepingComputer

Microsoft has successfully disrupted RedVDS, a significant cybercrime platform that has been linked to approximately $40 million in losses reported in the U.S. since March 2025. The platform was known for offering a virtual desktop service that criminals used to conduct various illegal activities. This disruption is a major step in combating cybercrime, as it not only targets the infrastructure used by attackers but also aims to deter future criminal operations. The impact of RedVDS has been felt widely, affecting numerous victims who have suffered financial losses due to the platform's activities. By taking action against RedVDS, Microsoft is contributing to a broader effort to enhance cybersecurity and protect individuals and businesses from ongoing threats.

Jan 15, 2026

QR codes are getting colorful, fancy, and dangerous

Help Net Security

QR codes are increasingly being stylized with colors and shapes, leading to new security risks. Researchers from Deakin University have identified that these visually appealing QR codes can be manipulated in 'quishing' attacks, where attackers trick users into scanning harmful codes. The assumption that QR codes are safe can make users more vulnerable to these scams. The study proposes a new method to detect compromised QR codes based on their structural analysis. This research emphasizes the need for users to remain cautious and critically evaluate QR codes, similar to how they approach links in emails or websites.

Jan 15, 2026

Verizon outage affects over 2 million users: What 'SOS' means, refunds, more updates

Alleged Dell data compromise raises skepticism

SCM feed for Latest

A recent report has cast doubt on the authenticity of a claimed data breach involving Dell. The incident allegedly compromised a database containing over 5,000 records, which include emails from more than 2,000 employees. However, security experts and researchers are questioning the validity of this breach, suggesting the information may not be as serious as it appears. If true, this situation could expose sensitive employee data, raising concerns about privacy and security within the company. As investigations continue, it remains essential for organizations to remain vigilant about potential data breaches and to verify claims before reacting.

Jan 15, 2026

Exposed Target source code legitimate, employees say

SCM feed for Latest

Recent reports confirm that internal source code and documentation from Target Corporation has been exposed on the public software development platform Gitea. Current and former employees verified the authenticity of the leaked materials, raising concerns about potential security vulnerabilities and misuse of sensitive information. The exposure of this source code could allow malicious actors to exploit weaknesses in Target's systems, potentially leading to data breaches or other security incidents. This situation not only affects Target but also raises alarms for customers and partners who rely on the company for secure transactions. It highlights the ongoing risks associated with software development platforms and the importance of securing proprietary code.

Jan 15, 2026

Intensified curtailment of North Korean cyber threats sought by US

SCM feed for Latest

The U.S. is calling on United Nations member states to strengthen sanctions against North Korea, particularly targeting its IT worker scheme and cryptocurrency thefts. These activities are believed to finance North Korea’s nuclear and ballistic missile programs. By pressuring other nations to take action, the U.S. aims to limit North Korea's ability to fund its military ambitions through cybercrime. This situation raises concerns among international cybersecurity experts, as North Korean cyber operations have become increasingly sophisticated and threatening. The focus on sanctions reflects a broader strategy to curb the regime's funding sources and deter its aggressive military posture.

Jan 15, 2026