Improper Authentication Vulnerability in Fortinet FortiWeb Products
CVE-2026-26035

8.8HIGH

Key Information:

Vendor

Fortinet
Status
Fortiweb
Vendor
CVE Published:
12 August 2026

What is CVE-2026-26035?

An improper authentication vulnerability in Fortinet's FortiWeb products allows remote unauthenticated attackers to gain access to the FortiWeb GUI and CLI using arbitrary usernames and passwords. This vulnerability highlights significant security weaknesses, which could lead to unauthorized access and manipulation of sensitive configurations within FortiWeb systems. Users are advised to apply available security patches and update their systems to mitigate this risk.

Affected Version(s)

FortiWeb 8.0.0 <= 8.0.2

FortiWeb 7.6.0 <= 7.6.6

FortiWeb 7.4.0 <= 7.4.11

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-158

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.