SB2026090977 - Unverified Ownership in Fortinet FortiClient for Windows
Published: September 9, 2026
Security Bulletin ID
SB2026090977
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Unverified Ownership (CVE-ID: CVE-2026-84386)
CWE-ID: CWE-283 - Unverified Ownership
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to damange or delete data.
The vulnerability exists due to unverified ownership. An authenticated attacker can terminate arbitrary processes via an exposed minifilter communication port.
Remediation
Install update from vendor's website.