Hackers bypass SonicWall VPN MFA due to incomplete patching

BleepingComputer

May 20, 2026 at 9:19 PM

Actively Exploited

Overview

Hackers have successfully bypassed multi-factor authentication (MFA) on SonicWall Gen6 SSL-VPN appliances, allowing them to gain unauthorized access to networks. They achieved this by brute-forcing VPN credentials, which enabled them to deploy tools commonly used in ransomware attacks. This incident poses a serious risk for organizations relying on SonicWall's VPN technology, as it undermines the security measures intended to protect sensitive data. Companies using these appliances should be vigilant and consider strengthening their security protocols. The exploitation of this vulnerability emphasizes the need for timely patching and updates to prevent similar attacks in the future.

Key Takeaways

Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
Affected Systems: SonicWall Gen6 SSL-VPN appliances
Action Required: Organizations should apply the latest patches from SonicWall and review their VPN security configurations to enhance protection against brute-force attacks.
Timeline: Newly disclosed

Original Article Summary

Threat actors brute-forced VPN credentials and bypassed multi-factor authentication (MFA) on SonicWall Gen6 SSL-VPN appliances to deploy tools used in ransomware attacks. [...]

Impact

SonicWall Gen6 SSL-VPN appliances

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

Organizations should apply the latest patches from SonicWall and review their VPN security configurations to enhance protection against brute-force attacks.

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 Ransomware, Vulnerability.

Read Original Article

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