SB2026081396 - Improper Authentication in FortiWeb
Published: August 13, 2026
Security Bulletin ID
SB2026081396
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Authentication (CVE-ID: CVE-2026-26035)
CWE-ID: CWE-287 - Improper Authentication
CVSSv4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
The vulnerability exists due to improper authentication in the RADIUS type admin group. A remote unauthenticated attacker can login into the Fortiweb GUI/CLI with a random username and password.
Remediation
Install update from vendor's website.