How severe is CVE-2019-17659?

CVE-2019-17659 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2019-17659 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-17659?

CVE-2019-17659 affects Fortinet Fortisiem. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-17659?

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

Does CVE-2019-17659 have an EU (EUVD) identifier?

Yes. CVE-2019-17659 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-6589.

When was CVE-2019-17659 published?

CVE-2019-17659 was published on 2025-03-17 and last updated on 2026-06-17.

CVE-2019-17659

CVE-2019-17659 is a low-severity vulnerability in Fortinet Fortisiem with a CVSS 3.x base score of 3.7. 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-798.

Key facts

Severity: Low (CVSS 3.x base score 3.7)
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-6589
Weakness: CWE-798
Affected product: Fortinet Fortisiem
Published: 2025-03-17
Last modified: 2026-06-17

Description

A use of hard-coded cryptographic key vulnerability in FortiSIEM version 5.2.6 may allow a remote unauthenticated attacker to obtain SSH access to the supervisor as the restricted user "tunneluser" by leveraging knowledge of the private key from another installation or a firmware image.

Frequently asked questions

What is CVE-2019-17659?: A use of hard-coded cryptographic key vulnerability in FortiSIEM version 5.2.6 may allow a remote unauthenticated attacker to obtain SSH access to the supervisor as the restricted user "tunneluser" by leveraging knowledge of the private key from another installation or a firmware image.
How severe is CVE-2019-17659?: CVE-2019-17659 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2019-17659 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-17659?: CVE-2019-17659 affects Fortinet Fortisiem. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-17659?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2019-17659 have an EU (EUVD) identifier?: Yes. CVE-2019-17659 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-6589.
When was CVE-2019-17659 published?: CVE-2019-17659 was published on 2025-03-17 and last updated on 2026-06-17.

References

https://fortiguard.fortinet.com/psirt/FG-IR-19-296

Affected products (1)

cpe:2.3:a:fortinet:fortisiem:*:*:*:*:*:*:*:*

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