TI-2017-12819 Aliases CVE-2017-17543 GHSA-94g8-mrxq-q59c

Users' VPN authentication credentials are unsafely encrypted in Fortinet FortiClient for…

LOW 39CWE-326Published 2018-04-26 · Updated 2024-10-25

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-326.

Summary

Users' VPN authentication credentials are unsafely encrypted in Fortinet FortiClient for Windows 5.6.0 and below versions, FortiClient for Mac OSX 5.6.0 and below versions and FortiClient SSLVPN Client for Linux 4.4.2335 and below versions, due to the use of a static encryption key and weak encryption algorithms.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00439 38th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Fortinet	FortiClient for Windows	5.6.0 and below versions	—	No fix listed	CNA
Fortinet	FortiClient for Mac OSX	5.6.0 and below versions	—	No fix listed	CNA
Fortinet	FortiClient SSLVPN Client for Linux	4.4.2335 and below versions	—	No fix listed	CNA

FortiClient for Windows VendorFortinet Affected 5.6.0 and below versions Fixed in — No fix listed CNA
FortiClient for Mac OSX VendorFortinet Affected 5.6.0 and below versions Fixed in — No fix listed CNA
FortiClient SSLVPN Client for Linux VendorFortinet Affected 4.4.2335 and below versions Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPE	Versions	Role	Vendor
cpe:2.3:a:fortinet:forticlient::::::windows::*	up to 5.6.0	Vulnerable	Fortinet
cpe:2.3:a:fortinet:forticlient::::::macos::*	up to 5.6.0	Vulnerable	Fortinet
cpe:2.3:a:fortinet:forticlient_sslvpn_client::::::linux::*	up to 4.4.2335	Vulnerable	Fortinet

cpe:2.3:a:fortinet:forticlient:*:*:*:*:*:windows:*:* Versions up to 5.6.0 Vulnerable ·Fortinet
cpe:2.3:a:fortinet:forticlient:*:*:*:*:*:macos:*:* Versions up to 5.6.0 Vulnerable ·Fortinet
cpe:2.3:a:fortinet:forticlient_sslvpn_client:*:*:*:*:*:linux:*:* Versions up to 4.4.2335 Vulnerable ·Fortinet

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2017-17543
2026-10-03 Alias added: GHSA-94g8-mrxq-q59c

References

Other 1

https://fortiguard.com/advisory/FG-IR-17-214

TI-2019-13180 An unquoted service path vulnerability in the FortiClient FortiTray component of… CVSS 3.1CRITICAL 9.8
TI-2023-24393 Code injection in Fortinet FortiClientLinux CVSS 3.1CRITICAL 9.4
TI-2017-10335 Information disclosure in Fortinet FortiClient for Windows CVSS 3.0HIGH 8.8
TI-2016-06998 In FortiClientWindows 5.4.1 and 5.4.2, an attacker may escalate privilege via a FortiClientNamedPipe vulnerability. CVSS 3.0HIGH 8.8
TI-2019-03954 Untrusted search path in Fortinet FortiClientWindows CVSS 3.1HIGH 8.6
TI-2017-05007 A privilege escalation in Fortinet FortiClient Windows 5.4.3 and earlier as well as 5.6.0… CVSS 3.0HIGH 8.1

See all 85 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences