Unsecured Zendesk systems fuel massive global spam wave

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January 22, 2026 at 10:42 PM

Actively Exploited

Overview

Attackers are exploiting unsecured Zendesk instances to send out a large volume of spam. These instances allow anyone, including unverified users, to submit support tickets, which the attackers are taking advantage of. This has led to a significant increase in spam messages across various platforms, affecting organizations that rely on Zendesk for customer support. The situation raises concerns about the security of customer interaction tools and highlights the need for companies to ensure their systems are properly configured to prevent unauthorized access. Organizations using Zendesk should review their security settings to mitigate this risk.

Key Takeaways

Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
Affected Systems: Zendesk support ticket system
Action Required: Review and secure Zendesk configurations to restrict ticket submissions to verified users.
Timeline: Ongoing since recent weeks

Original Article Summary

Attackers are abusing Zendesk instances that allow unverified users to submit support tickets.

Impact

Zendesk support ticket system

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

Ongoing since recent weeks

Remediation

Review and secure Zendesk configurations to restrict ticket submissions to verified users.

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.

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