CVE-2026-26035
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk49th percentile - higher than 49% of all known CVEs
Summary
An Improper Authentication vulnerability (CWE-287) in Fortinet FortiWeb versions 8.0.0-8.0.2, 7.6.0-7.6.6, 7.4.0-7.4.11, 7.2.0-7.2.12, 7.0.0-7.0.12 may allow a remote unauthenticated attacker to login into the Fortiweb GUI/CLI with a random username and password.
Risk Assessment
An attacker can gain unauthorized access to the FortiWeb management interface, potentially leading to compromise of the device and network.
Recommendation
Update FortiWeb to a patched version (e.g., 8.0.3 or later, 7.6.7 or later, etc.) as per vendor recommendations.
Other vulnerabilities in FortiWeb
See all- CVE-2026-40688High
An out-of-bounds write vulnerability in Fortinet FortiWeb versions 8.0.0-8.0.3, 7.6.0-7.6.6, 7.4.0-7.4.11 allows a remote privileged attacker to execute arbitrary code or commands via crafted HTTP requests.
- CVE-2025-64447High
FortiWeb versions 8.0.0 through 8.0.1, 7.6.0 through 7.6.5, 7.4.0 through 7.4.10, 7.2.0 through 7.2.11, and 7.0.0 through 7.0.11 rely on cookies without validation and integrity checking. An unauthenticated attacker may execute arbitrary operations on the system via crafted HTTP or HTTPS requests using forged cookies, requiring prior knowledge of the FortiWeb serial number.
- CVE-2025-58034HighActively exploited
An Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability [CWE-78] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.1, FortiWeb 7.6.0 through 7.6.5, FortiWeb 7.4.0 through 7.4.10, FortiWeb 7.2.0 through 7.2.11, FortiWeb 7.0.0 through 7.0.11 may allow an authenticated attacker to execute unauthorized code on the underlying system via crafted HTTP requests or CLI commands.
- CVE-2026-70466Medium
Fortinet FortiWeb versions 8.0.0-8.0.2, 7.6.0-7.6.5, 7.4 (all), 7.2 (all), and 7.0 (all) have an incomplete list of disallowed inputs vulnerability, which may allow an attacker to cause improper access control.
- CVE-2025-64471Medium
A use of password hash instead of password for authentication vulnerability [CWE-836] in Fortinet FortiWeb 8.0.0 through 8.0.1, FortiWeb 7.6.0 through 7.6.5, FortiWeb 7.4.0 through 7.4.10, FortiWeb 7.2.0 through 7.2.11, FortiWeb 7.0.0 through 7.0.11 may allow an unauthenticated attacker to use the hash in place of the password to authenticate via crafted HTTP/HTTPS requests.
Original NVD description (English source)
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
Vulnerability data from NVD (NIST) · CISA KEV · EPSS