Critical

Zendesk spam wave returns, floods users with 'Activate account' emails

BleepingComputer

February 5, 2026 at 10:22 AM

Actively Exploited

Overview

Users around the world are currently facing a surge of spam emails linked to unsecured Zendesk support systems. Many recipients report getting hundreds of emails with alarming subject lines, such as 'Activate account...'. This issue stems from automated systems that are not properly secured, allowing attackers to exploit these vulnerabilities and flood inboxes with unwanted messages. The situation has raised concerns about the security of customer support platforms and the potential for phishing attempts, as these emails can trick users into revealing personal information. Companies using Zendesk should review their security settings to prevent further exploitation and protect their users.

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 review and secure their Zendesk configurations to prevent automated email exploitation.
Timeline: Ongoing since October 2023

Original Article Summary

A fresh wave of spam is hitting inboxes worldwide, with users reporting that they are once again being bombarded by automated emails generated through companies' unsecured Zendesk support systems. Some recipients say they are receiving hundreds of messages with strange or alarming subject lines. such as 'Activate account...' [...]

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 review and secure their Zendesk configurations to prevent automated email 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 Phishing, Exploit.

Read Original Article

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