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CVE-2025-66178 is an OS command injection vulnerability residing in the API of Fortinet FortiWeb. The issue stems from improper neutralization of special elements used in OS commands. An authenticated attacker can exploit this flaw by sending a specially crafted HTTP request to the target appliance. The vulnerable API endpoint fails to properly validate or sanitize user-supplied input before incorporating it into a system command. When the malicious request is processed, the injected commands are executed with the elevated privileges of the web server, allowing the attacker to take full control of the underlying operating system.
dailycve form:
Platform: Fortinet FortiWeb
Version: 7.0.0-8.0.1
Vulnerability : OS Command Injection
Severity: High (CVSSv4: 8.7)
date: 03/12/2026
Prediction: Patch released 03/11/2026
What Undercode Say:
Analytics:
- CVE published: 03/10/2026
- Last modified: 03/12/2026
- Source: Fortinet
- CVSSv4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- CWE: CWE-78
- Attack Vector: Remote
- Privileges Required: High
- User Interaction: None
- Public Exploit: No
- Vulnerable Versions: 8.0.0-8.0.1, 7.6.0-7.6.5, 7.4.0-7.4.11, 7.2.0-7.2.12, 7.0.0-7.0.12
Exploit:
- Authenticated attacker crafts malicious HTTP request.
- Request injects OS commands (e.g.,
; whoami,| id,`cat /etc/passwd`) into vulnerable parameter. - Command injection bypasses input sanitization.
- No public proof-of-concept available currently .
Protection from this CVE:
– `update system firmware` (Upgrade to patched version).
– Restrict API access via config system access-limit.
– `diagnose debug application httpd -1` (Monitor for suspicious HTTP requests).
– `config system ha` (Ensure high availability during patching).
Impact:
Successful exploitation allows remote authenticated users to execute arbitrary OS commands, leading to full system compromise, data exfiltration, and potential lateral movement within the network .
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Sources:
Reported By: nvd.nist.gov
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