How severe is CVE-2018-9191?

CVE-2018-9191 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-9191 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-9191?

CVE-2018-9191 affects Fortinet Forticlient. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-9191?

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.

When was CVE-2018-9191 published?

CVE-2018-9191 was published on 2019-05-30 and last updated on 2026-06-17.

CVE-2018-9191

CVE-2018-9191 is a high-severity vulnerability in Fortinet Forticlient with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.6
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Fortinet Forticlient
Published: 2019-05-30
Last modified: 2026-06-17

Description

A local privilege escalation in Fortinet FortiClient for Windows 6.0.4 and earlier allows attackers to execute unauthorized code or commands via the named pipe responsible for Forticlient updates.

Frequently asked questions

What is CVE-2018-9191?: A local privilege escalation in Fortinet FortiClient for Windows 6.0.4 and earlier allows attackers to execute unauthorized code or commands via the named pipe responsible for Forticlient updates.
How severe is CVE-2018-9191?: CVE-2018-9191 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-9191 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-9191?: CVE-2018-9191 affects Fortinet Forticlient. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-9191?: 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.
When was CVE-2018-9191 published?: CVE-2018-9191 was published on 2019-05-30 and last updated on 2026-06-17.

References

https://fortiguard.com/advisory/FG-IR-18-108

Affected products (1)

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

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