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Advisory severityHigh8.1Fortinet Exploited CISA KEV

High [CVE-2025-25249] 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…

This high-severity Fortinet advisory covers CVE-2025-25249 affecting FortiOS.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2025-25249 Source published Source updated

VulniPulse record published Record updated

CVE-2025-25249
Affected products & platforms
FortinetFortiGateFirewallFortiOSFortiSwitch
Open source advisory

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Summary

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

CISA Known Exploited Vulnerability

Listed:
Sep 9, 2026 · federal remediation due Sep 12, 2026
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.
Ransomware use:
Unknown

KEV is a prioritization signal from CISA — remediation detail still comes from the vendor advisory.

Affected versions
  • 7.6.0
  • 7.4.0
  • 7.2.0
  • 7.0.0
  • all versions

Official advisory · high-confidence parse· fetched 3 months ago·verify at source

Fixed versions

No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.

Official advisory · high-confidence parse· fetched 3 months ago·verify at source

Mitigation

The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.

Official advisory · high-confidence parse· fetched 3 months ago·verify at source

Discussion(0)

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