High severity · published Oct 27, 2026
CVE-2026-106174
A improper locking vulnerability in Fortinet FortiOS 8.0.0, FortiOS 7.6.4 through 7.6.6 may allow an unauthenticated attacker with network access to the device to cause a denial…
New
7.5
CVSS
0.3%
EPSS
No
On KEV
Description
A improper locking vulnerability in Fortinet FortiOS 8.0.0, FortiOS 7.6.4 through 7.6.6 may allow an unauthenticated attacker with network access to the device to cause a denial of service of the HTTPS management interface via crafted HTTP requests.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
FortiOS · Fortinet
8.0.0; 7.6.4 through 7.6.6 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-106174
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-106174
fortiguard.fortinet.com
https://fortiguard.fortinet.com/psirt/FG-IR-26-181
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