CVE-2019-5589 — An Unsafe Search Path vulnerability in FortiClient Online Installer (Windows version before 6.0.6) may allow an unauthenticated, remote attacker with control over the directory in which FortiClientOnlineInstaller.exe resides to execute arbitrary code on the system via uploading malicious .dll files in that directory

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HIGH

An Unsafe Search Path vulnerability in FortiClient Online Installer (Windows version before 6.0.6) may allow an unauthenticated, remote attacker with control over the directory in which FortiClientOnlineInstaller.exe resides to execute arbitrary code on the system via uploading malicious .dll files in that directory

Published May 28, 2019

7.8

HIGH

CVSS 3.0

EPSS 2.61%

Description

An Unsafe Search Path vulnerability in FortiClient Online Installer (Windows version before 6.0.6) may allow an unauthenticated, remote attacker with control over the directory in which FortiClientOnlineInstaller.exe resides to execute arbitrary code on the system via uploading malicious .dll files in that directory.

Affected products

Vendor Fortinet Product Fortinet FortiClient for Windows Default
n/a
- Version
  FortiClient for Windows version below 6.0.6
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Fortinet

Fortinet FortiClient for Windows

n/a

Version	Status	Constraints
FortiClient for Windows version below 6.0.6	affected	-

Remediation

No remediation recorded yet.

Metrics

2.61% 0.02613

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.

EPSS probability 0.02613

Score over time

2021–2026

EPSS v1
EPSS v2
EPSS v3
EPSS v5

Percentile over time

EPSS v1
EPSS v2
EPSS v3
EPSS v5

Table of values (14 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 2, 2026	2.61% (0.02613)	84.89th	v5 (v2026.06.15)
Jun 15, 2026	2.61% (0.02613)	83.36th	v5 (v2026.06.15)
Jul 20, 2024	0.23% (0.00231)	61.63th	v3 (v2023.03.01)
Jul 7, 2023	0.23% (0.00231)	60.09th	v3 (v2023.03.01)
Mar 17, 2023	0.17% (0.00170)	52.30th	v3 (v2023.03.01)
Mar 7, 2023	0.15% (0.00149)	49.21th	v3 (v2023.03.01)
Mar 6, 2023	1.10% (0.01103)	53.77th	v2 (v2022.01.01)
Sep 15, 2022	1.10% (0.01103)	52.07th	v2 (v2022.01.01)
Apr 1, 2022	1.10% (0.01103)	50.07th	v2 (v2022.01.01)
Feb 4, 2022	8.82% (0.08825)	82.88th	v2 (v2022.01.01)
Feb 3, 2022	3.99% (0.03991)	73.89th	v1
Jan 6, 2022	3.99% (0.03991)	73.67th	v1
Sep 1, 2021	0.92% (0.00918)	60.61th	v1
Apr 14, 2021	0.92% (0.00918)	0.00th	v1

Weaknesses (1)

CWE-426

References (1)

https://fortiguard.com/advisory/FG-IR-19-060
x_refsource_CONFIRMVendor Advisory

Link	Providers	Tags
https://fortiguard.com/advisory/FG-IR-19-060		x_refsource_CONFIRMVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner fortinet

Published May 28, 2019

Updated Oct 25, 2024

Reserved Jan 7, 2019

Link CVE-2019-5589

CISA Vulnrichment

Updated Oct 24, 2024

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2019-5589

Red Hat

Severity n/a

Public date n/a

Links CVE-2019-5589