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FortiWeb Vulnerabilities Exploited: Path Traversal and OS Command Injection

FortiWeb Vulnerabilities Exploited: Path Traversal and OS Command Injection

First seen 17 Jun 2026, 12:42 UTC •

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ThreatCluster AI
ThreatCluster •June 18, 2026 at 12:13 UTC
  • •Two critical vulnerabilities in FortiWeb are actively being exploited.
  • •The first vulnerability allows unauthenticated command execution; the second affects authenticated users.
  • •Fortinet recommends disabling HTTP/HTTPS access until systems are upgraded.

Two vulnerabilities in FortiWeb have been identified, both exploited in the wild. The first, a relative path traversal vulnerability (CWE-23), allows unauthenticated attackers to execute administrative commands via crafted HTTP or HTTPS requests. The second, an OS command injection vulnerability (CWE-78), enables authenticated attackers to execute unauthorized code through crafted HTTP requests or CLI commands. Both vulnerabilities affect FortiWeb systems but do not impact FortiAppSec Cloud. Fortinet recommends disabling HTTP/HTTPS for internet-facing interfaces as a temporary mitigation until upgrades can be performed. Customers are advised to review their configurations and logs for unauthorized changes. Immediate action is necessary to prevent exploitation.

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Updated 123d ago How this analysis works

Timeline

2026-06-17
FortiWeb vulnerabilities disclosed
Fortinet announced two vulnerabilities in FortiWeb, one allowing unauthenticated command execution and the other for authenticated OS command injection.
FortiGuard
2026-06-17
Active exploitation confirmed
Fortinet confirmed that both vulnerabilities are being exploited in the wild, prompting immediate advisories for users.
FortiGuard
2026-06-17
Mitigation recommendations issued
Fortinet advised customers to disable HTTP/HTTPS for internet-facing interfaces and review configurations and logs.
FortiGuard

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