CVE Catalog

Actively exploited in the wild

Fortinet Multiple Products Heap-based Buffer Overflow Vulnerability

Fortinet - Multiple Products · Listed in the CISA KEV since 2026-09-09. This indicates confirmed attacks in production environments.

Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

CVE-2025-25249

HighCVSS 8.1KEV
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Elevated risk
0.76%

53th percentile - higher than 53% of all known CVEs

Summary

A heap-based buffer overflow vulnerability in Fortinet FortiOS and FortiSwitchManager allows an attacker to execute unauthorized code or commands via specially crafted packets. This affects FortiOS versions from 7.0.0 to 7.6.3 and FortiSwitchManager from 7.0.0 to 7.2.6.

Risk Assessment

This vulnerability poses a serious risk to organizations, allowing attackers to remotely execute code, potentially compromising systems and data.

Recommendation

It is recommended to upgrade to the latest version of FortiOS and FortiSwitchManager to mitigate this vulnerability and to monitor network traffic for potential attacks.

Related vulnerabilities

Original NVD description (English source)

A heap-based buffer overflow vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2.0 through 7.2.11, FortiOS 7.0.0 through 7.0.17, FortiOS 6.4 all versions, FortiSwitchManager 7.2.0 through 7.2.6, FortiSwitchManager 7.0.0 through 7.0.5 allows attacker to execute unauthorized code or commands via specially crafted packets

Vulnerability data from NVD (NIST) · CISA KEV · EPSS