CVE-2026-26035
Received Received - Intake

Improper Authentication in Fortinet FortiWeb

Publication date: 2026-08-12

Last updated on: 2026-08-12

Assigner: Fortinet, Inc.

Description
An Improper Authentication vulnerability [CWE-287] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11, FortiWeb 7.2.0 through 7.2.12, FortiWeb 7.0.0 through 7.0.12 may allow a remote unauthenticated attacker to login into the Fortiweb GUI/CLI with a random username and password

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Meta Information

Published
2026-08-12
Last Modified
2026-08-12
Generated
2026-08-12
AI Q&A
2026-08-12
EPSS Evaluated
N/A
NVD
CVE-2026-26035
EUVD
EUVD-2026-57193

Affected Vendors & Products

Showing 5 associated CPEs
Vendor Product Version / Range
fortinet fortiweb From 8.0.0 (inc) to 8.0.2 (inc)
fortinet fortiweb From 7.6.0 (inc) to 7.6.6 (inc)
fortinet fortiweb From 7.4.0 (inc) to 7.4.11 (inc)
fortinet fortiweb From 7.2.0 (inc) to 7.2.12 (inc)
fortinet fortiweb From 7.0.0 (inc) to 7.0.12 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-287 When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

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Executive Summary

This is an Improper Authentication vulnerability in Fortinet FortiWeb versions 7.0.0 through 8.0.2. It allows a remote unauthenticated attacker to bypass authentication and log into the FortiWeb GUI or CLI using a random username and password.

Impact Analysis

An attacker could gain full administrative access to the FortiWeb device, allowing them to read sensitive data, modify configurations, disrupt services, or launch further attacks within the network.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating compliance requirements for GDPR, HIPAA, and other regulations that mandate strict access controls and data protection.

Mitigation Strategies

Immediately upgrade FortiWeb to a patched version as this vulnerability allows remote unauthenticated access to GUI/CLI. Disable remote access if not required and review all user accounts for unauthorized access. Monitor network traffic for suspicious login attempts.

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