How severe is CVE-2024-40590?

CVE-2024-40590 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2024-40590 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-40590?

CVE-2024-40590 primarily affects Fortinet Fortiportal. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-40590?

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

Does CVE-2024-40590 have an EU (EUVD) identifier?

Yes. CVE-2024-40590 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-54073.

When was CVE-2024-40590 published?

CVE-2024-40590 was published on 2025-03-14 and last updated on 2026-06-17.

CVE-2024-40590

CVE-2024-40590 is a medium-severity vulnerability in Fortinet Fortiportal with a CVSS 3.x base score of 4.8. 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-295.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-54073
Weakness: CWE-295
Affected product: Fortinet Fortiportal
Published: 2025-03-14
Last modified: 2026-06-17

Description

An improper certificate validation vulnerability [CWE-295] in FortiPortal version 7.4.0, version 7.2.4 and below, version 7.0.8 and below, version 6.0.15 and below when connecting to a FortiManager device, a FortiAnalyzer device, or an SMTP server may allow an unauthenticated attacker in a Man-in-the-Middle position to intercept on and tamper with the encrypted communication channel established between the FortiPortal and those endpoints.

Frequently asked questions

What is CVE-2024-40590?: An improper certificate validation vulnerability [CWE-295] in FortiPortal version 7.4.0, version 7.2.4 and below, version 7.0.8 and below, version 6.0.15 and below when connecting to a FortiManager device, a FortiAnalyzer device, or an SMTP server may allow an unauthenticated attacker in a Man-in-the-Middle position to intercept on and tamper with the encrypted communication channel established between the FortiPortal and those endpoints.
How severe is CVE-2024-40590?: CVE-2024-40590 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2024-40590 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-40590?: CVE-2024-40590 primarily affects Fortinet Fortiportal. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-40590?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-40590 have an EU (EUVD) identifier?: Yes. CVE-2024-40590 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-54073.
When was CVE-2024-40590 published?: CVE-2024-40590 was published on 2025-03-14 and last updated on 2026-06-17.

References

https://fortiguard.fortinet.com/psirt/FG-IR-22-155

Affected products (2)

cpe:2.3:a:fortinet:fortiportal:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiportal:7.4.0:*:*:*:*:*:*:*

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