How severe is CVE-2025-62439?

CVE-2025-62439 has a CVSS 3.x base score of 4.2, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-62439 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-62439?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-62439 have an EU (EUVD) identifier?

Yes. CVE-2025-62439 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207438.

When was CVE-2025-62439 published?

CVE-2025-62439 was published on 2026-02-10 and last updated on 2026-06-17.

CVE-2025-62439

CVE-2025-62439 is a medium-severity vulnerability with a CVSS 3.x base score of 4.2. 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-940.

Key facts

Severity: Medium (CVSS 3.x base score 4.2)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-207438
Weakness: CWE-940
Published: 2026-02-10
Last modified: 2026-06-17

Description

An Improper Verification of Source of a Communication Channel vulnerability [CWE-940] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7.4.0 through 7.4.9, FortiOS 7.2 all versions, FortiOS 7.0 all versions may allow an authenticated user with knowledge of FSSO policy configurations to gain unauthorized access to protected network resources via crafted requests.

Frequently asked questions

What is CVE-2025-62439?: An Improper Verification of Source of a Communication Channel vulnerability [CWE-940] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7.4.0 through 7.4.9, FortiOS 7.2 all versions, FortiOS 7.0 all versions may allow an authenticated user with knowledge of FSSO policy configurations to gain unauthorized access to protected network resources via crafted requests.
How severe is CVE-2025-62439?: CVE-2025-62439 has a CVSS 3.x base score of 4.2, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-62439 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-62439?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-62439 have an EU (EUVD) identifier?: Yes. CVE-2025-62439 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207438.
When was CVE-2025-62439 published?: CVE-2025-62439 was published on 2026-02-10 and last updated on 2026-06-17.

References

Other CWE-940 vulnerabilities

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CVE-2026-33875 — Critical (CVSS 9.3): Gematik Authenticator securely authenticates users for login to digital health applications. Versions prior to 4.16.0…

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