How severe is CVE-2025-64447?

CVE-2025-64447 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-64447 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-64447?

CVE-2025-64447 affects Fortinet Fortiweb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-64447?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-64447 have an EU (EUVD) identifier?

Yes. CVE-2025-64447 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-202281.

When was CVE-2025-64447 published?

CVE-2025-64447 was published on 2025-12-09 and last updated on 2026-06-17.

CVE-2025-64447

CVE-2025-64447 is a high-severity vulnerability in Fortinet Fortiweb with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-565.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 7% (94th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-202281
Weakness: CWE-565
Affected product: Fortinet Fortiweb
Published: 2025-12-09
Last modified: 2026-06-17

Description

A reliance on cookies without validation and integrity checking vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.1, FortiWeb 7.6.0 through 7.6.5, FortiWeb 7.4.0 through 7.4.10, FortiWeb 7.2.0 through 7.2.11, FortiWeb 7.0.0 through 7.0.11 may allow an unauthenticated attacker to execute arbitrary operations on the system via crafted HTTP or HTTPS request via forged cookies, requiring prior knowledge of the FortiWeb serial number.

Frequently asked questions

What is CVE-2025-64447?: A reliance on cookies without validation and integrity checking vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.1, FortiWeb 7.6.0 through 7.6.5, FortiWeb 7.4.0 through 7.4.10, FortiWeb 7.2.0 through 7.2.11, FortiWeb 7.0.0 through 7.0.11 may allow an unauthenticated attacker to execute arbitrary operations on the system via crafted HTTP or HTTPS request via forged cookies, requiring prior knowledge of the FortiWeb serial number.
How severe is CVE-2025-64447?: CVE-2025-64447 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-64447 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-64447?: CVE-2025-64447 affects Fortinet Fortiweb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-64447?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-64447 have an EU (EUVD) identifier?: Yes. CVE-2025-64447 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-202281.
When was CVE-2025-64447 published?: CVE-2025-64447 was published on 2025-12-09 and last updated on 2026-06-17.

References

https://fortiguard.fortinet.com/psirt/FG-IR-25-945

Affected products (1)

cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*

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