Critical

Russian Hackers Exploit New ‘Zero-Click’ Attack Against Western Organizations

Infosecurity Magazine

July 23, 2026 at 3:50 PM

Actively Exploited

Overview

Russian hackers have reportedly launched a state-backed campaign targeting Western organizations by exploiting a serious vulnerability in the Zimbra Collaboration Suite. This 'zero-click' attack allows hackers to gain access without any user interaction, making it particularly dangerous. International agencies have issued a joint alert, urging organizations using Zimbra to take immediate precautions. The vulnerability is significant, as it can lead to unauthorized access to sensitive data. Companies and users utilizing this software need to stay vigilant and ensure their systems are updated to protect against potential breaches.

Key Takeaways

Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
Affected Systems: Zimbra Collaboration Suite
Action Required: Organizations using Zimbra should apply the latest security patches and updates as recommended by Zimbra's security advisory.
Timeline: Newly disclosed

Original Article Summary

International agencies issue joint alert over state-backed campaign exploiting a critical vulnerability in the Zimbra Collaboration Suite

Impact

Zimbra Collaboration Suite

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 using Zimbra should apply the latest security patches and updates as recommended by Zimbra's security advisory.

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, Vulnerability, Critical.

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