Broad, widely used Fortinet infrastructure; remote code execution via crafted packets could compromise networks across industries.
CVE-2025-25249
Fortinet heap overflow enables remote code execution.
Is CVE-2025-25249 being exploited?
Yes. CVE-2025-25249 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.
How severe is CVE-2025-25249?
CVE-2025-25249 is rated High with a CVSS score of 8.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2025-25249?
Yes. A fix has been recorded for CVE-2025-25249. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2025-25249 affect?
CVE-2025-25249 affects FortiOS 6.4.0-6.4.16, FortiOS 7.0.0-7.0.17, FortiOS 7.2.0-7.2.11, FortiOS 7.4.0-7.4.8, and 5 further products or versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2025-25249?
Apply Fortinet patch; reboot as required; verify exposed services
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution on Fortinet devices via crafted packets; attacker can take control, potentially full network compromise.
Immediate action required
- affected>= 7.6.0 and <= 7.6.2
- affected>= 7.4.0 and <= 7.4.7
- affected>= 7.2.4 and <= 7.2.11
- affected>= 7.2.2 and <= 7.2.5
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.