CVE-2026-35616: FortiClient EMS Flaw Actively Exploited in Malware Attacks

Security Affairs

May 28, 2026 at 4:05 PM

Actively Exploited

Overview

A recently identified vulnerability in FortiClient Endpoint Management Server (EMS), tracked as CVE-2026-35616, is being actively exploited to deploy information-stealing malware, according to a report from Arctic Wolf. This flaw has a high severity rating of 9.1 and allows attackers to execute remote code without needing authentication, making it particularly dangerous. Organizations using FortiClient EMS should be on high alert as the vulnerability can be exploited through specially crafted requests. The vulnerability was patched in April, but the ongoing exploitation highlights the importance of timely updates and monitoring for suspicious activity. Companies must ensure they have applied the latest patches to protect their systems from these attacks.

Key Takeaways

Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
Affected Systems: FortiClient Endpoint Management Server (EMS)
Action Required: Organizations should apply the patch released in April to FortiClient EMS to mitigate the vulnerability.
Timeline: Newly disclosed

Original Article Summary

A critical FortiClient Endpoint Management Server (EMS) vulnerability patched in April has been exploited in fresh attacks to deploy information-stealing malware, Arctic Wolf reports. The flaw, tracked as CVE-2026-35616 (CVSS score of 9.1), can be exploited remotely via crafted requests for remote code execution (RCE) and does not require authentication. Threat actors are exploiting a critical FortiClient […]

Impact

FortiClient Endpoint Management Server (EMS)

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 patch released in April to FortiClient EMS to mitigate the vulnerability. Regularly monitor systems for any unauthorized access or unusual activity.

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 CVE, Vulnerability, Malware, and 2 more.

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