Zendesk ticket systems hijacked in massive global spam wave

BleepingComputer

January 21, 2026 at 11:46 PM

Actively Exploited

Overview

A significant spam wave is hitting users globally, stemming from unsecured Zendesk support systems. Victims are reporting receiving hundreds of unsolicited emails with unusual and sometimes alarming subject lines, raising concerns about the safety and security of their information. This incident indicates a serious lapse in security measures, as attackers are exploiting vulnerabilities in the ticketing system to send out mass spam. The situation is alarming as it not only affects individuals but could also lead to broader security issues if sensitive information is compromised. Companies using Zendesk should review their security protocols to prevent unauthorized access and protect their users from being targeted in this way.

Key Takeaways

Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
Affected Systems: Zendesk support systems
Action Required: Companies should secure their Zendesk systems and review access controls to prevent unauthorized exploitation.
Timeline: Ongoing since October 2023

Original Article Summary

People worldwide are being targeted by a massive spam wave originating from unsecured Zendesk support systems, with victims reporting receiving hundreds of emails with strange and sometimes alarming subject lines. [...]

Impact

Zendesk support systems

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 October 2023

Remediation

Companies should secure their Zendesk systems and review access controls to prevent unauthorized exploitation.

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 Data Breach.

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