Improper Locking Vulnerability in Fortinet FortiOS
CVE-2026-106174

6.7MEDIUM

Key Information:

Vendor

Fortinet
Status
FortiOS
Vendor
CVE Published:
27 October 2026

What is CVE-2026-106174?

An improper locking vulnerability exists in Fortinet's FortiOS versions 8.0.0 and 7.6.4 through 7.6.6. This flaw may permit an unauthenticated attacker with network access to the device to initiate a denial of service against the HTTPS management interface. By sending specifically crafted HTTP requests, the attacker can disrupt management access, posing a significant risk to network operations.

Affected Version(s)

FortiOS 8.0.0

FortiOS 7.6.4 <= 7.6.6

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-181

CVSS V3.1

Score:
6.7
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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