CVE-2024-54019: Fortinet FortiClientWindows · Improper Access Control
Affects Fortinet FortiClientWindowsSource CVE Database V5
Not known to be exploited · CVSS 4.4 Medium.
Data as of 26 Oct 2026, 08:30 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:P/RL:W/RC:CExploitation evidence
Disclosed: evidence found.
CVE published 10 Jun 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Fortinet FortiClientWindows | Affected
| Fixed in– |
AI-suggested
In the interim, organizations should enforce strict DNS security measures, such as deploying DNSSEC validation and using trusted DNS resolvers to reduce the risk of DNS spoofing. Network segmentation and monitoring for unusual VPN connection patterns can help detect potential redirection attempts. Additionally, implementing multi-factor authentication (MFA) on VPN access can reduce the impact of intercepted credentials. Organizations should also educate users about the risks of connecting to untrusted networks and encourage the use of secure, encrypted DNS protocols like DoH or DoT. Finally, network administrators should review VPN server certificate configurations to ensure strict hostname verification policies are enforced wherever possible.
Description
A improper validation of certificate with host mismatch in Fortinet FortiClientWindows version 7.4.0, versions 7.2.0 through 7.2.6, and 7.0 all versions allow an unauthorized attacker to redirect VPN connections via DNS spoofing or another form of redirection.