MFA Failure Enables Infostealer Breach At 50 Enterprises

Infosecurity Magazine

January 7, 2026 at 9:45 AM

Actively Exploited

Overview

A hacker group known as Zestix has successfully breached around 50 companies by exploiting a lack of multi-factor authentication (MFA). These breaches involved the use of infostealers, which are malicious programs designed to gather sensitive information from users. The absence of MFA made it easier for attackers to gain access to sensitive data without needing additional verification steps. This incident serves as a stark reminder for businesses to implement stronger security measures, as it shows how quickly attackers can exploit basic vulnerabilities. Organizations that haven't adopted MFA may find themselves at greater risk of data theft and financial loss.

Key Takeaways

Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
Affected Systems: 50 enterprises, infostealer malware
Action Required: Implement multi-factor authentication (MFA) to enhance security against unauthorized access.
Timeline: Newly disclosed

Original Article Summary

Threat actor “Zestix” was able to breach around 50 firms using infostealers because they lacked multi-factor authentication

Impact

50 enterprises, infostealer malware

Exploitation Status

This vulnerability is confirmed to be actively exploited by attackers in real-world attacks. Organizations should prioritize patching or implementing workarounds immediately.

Timeline

Newly disclosed

Remediation

Implement multi-factor authentication (MFA) to enhance security against unauthorized access.

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 Exploit.

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