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Fortinet is notifying clients about a significant security issue in FortiSIEM, indicating that there is an active exploit in circulation.

The weakness, identified as CVE-2025-25256, has a CVSS rating of 9.8 on a scale of 10.0.

“A flawed neutralization of specific elements utilized in an operating system command (‘OS Command Injection’) vulnerability [CWE-78] in FortiSIEM might permit an unauthenticated adversary to

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