Improper locking in FortiOS - CVE-2026-106174
Published: October 14, 2026
Vulnerability identifier: #VU155648
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-106174
CWE-ID: CWE-667
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking. An unauthenticated attacker with network access can the device to cause a denial of service of the HTTPS management interface via crafted HTTP requests.
Affected software
FortiOS
How to mitigate CVE-2026-106174
Install update from vendor's website.
FortiOS - addressed in versions 7.6.7, 8.0.1