CVE entry · CVE-2025-32756
CVE-2025-32756: Fortinet Multiple Products Stack-Based Buffer Overflow Vulnerability
Fortinet FortiFone, FortiVoice, FortiNDR and FortiMail contain a stack-based overflow vulnerability that may allow a remote unauthenticated attacker to execute arbitrary code or commands via crafted HTTP requests.
- Actively exploited: added to CISA’s KEV catalog on May 14, 2025.
- Use by ransomware: not established so far.
- Remediation deadline for US federal agencies: June 4, 2025.
- CERT-FR alert CERTFR-2025-ALE-006 of May 13, 2025.
Description from CISA’s KEV catalog.
CERT-FR alerts and notices
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CERTFR-2025-ALE-006Vulnérabilité dans les produits Fortinet (13 mai 2025)
What to do
- Check whether your estate includes affected Fortinet products, including internet-facing devices.
- Apply the vendor’s patch or mitigations (references below). Failing that, isolate the product or stop using it, as CISA requires of US federal agencies.
- An exploited vulnerability has often been used before it was fixed: look for signs of compromise, especially on internet-facing devices.
References
- Vendor advisory or reference cited by CISA (fortiguard.fortinet.com)
- NVD entry (NIST)
- CISA KEV catalog
Other Fortinet vulnerabilities
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Fortinet Multiple Products Path Traversal Vulnerability
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Fortinet FortiMail Path Traversal Vulnerability
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Fortinet Multiple Products Heap-based Buffer Overflow Vulnerability
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Fortinet FortiOS Exposure of Sensitive Information to an Unauthorized Actor Vulnerability
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Fortinet FortiSandbox OS Command Injection Vulnerability
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Fortinet FortiSandbox OS Command Injection Vulnerability