How severe is CVE-2019-17658?

CVE-2019-17658 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-17658 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-17658?

CVE-2019-17658 affects Fortinet Forticlient. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-17658?

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

When was CVE-2019-17658 published?

CVE-2019-17658 was published on 2020-03-12 and last updated on 2026-06-17.

CVE-2019-17658

CVE-2019-17658 is a critical-severity vulnerability in Fortinet Forticlient with a CVSS 3.x base score of 9.8. 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-428.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-428
Affected product: Fortinet Forticlient
Published: 2020-03-12
Last modified: 2026-06-17

Description

An unquoted service path vulnerability in the FortiClient FortiTray component of FortiClientWindows v6.2.2 and prior allow an attacker to gain elevated privileges via the FortiClientConsole executable service path.

Frequently asked questions

What is CVE-2019-17658?: An unquoted service path vulnerability in the FortiClient FortiTray component of FortiClientWindows v6.2.2 and prior allow an attacker to gain elevated privileges via the FortiClientConsole executable service path.
How severe is CVE-2019-17658?: CVE-2019-17658 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-17658 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-17658?: CVE-2019-17658 affects Fortinet Forticlient. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-17658?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-17658 published?: CVE-2019-17658 was published on 2020-03-12 and last updated on 2026-06-17.

References

https://fortiguard.com/advisory/FG-IR-19-281

Affected products (1)

cpe:2.3:a:fortinet:forticlient:*:*:*:*:*:windows:*:*

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