--- title: "SECURITY ALERT: FortiOS SSL-VPN Vulnerability Exploited" description: "Systems Engineering is aware of the following security vulnerability in FortiOS: CVE-2022-42475 / FG-IR-22-398." image: https://blog.systemsengineering.com/hubfs/Security%20Alert_Systems%20Engineering.png --- [![header-logo](https://blog.systemsengineering.com/hs-fs/hubfs/header-logo.png?width=138&name=header-logo.png)](https://www.systemsengineering.com) 888.624.6737 ![Spyglass](https://www.systemsengineering.com/wp-content/uploads/search-google-e1751908066340.png) - [Careers](https://www.systemsengineering.com/about/careers/) - [Blog](https://blog.systemsengineering.com/blog) - [Events](https://www.systemsengineering.com/news-resources/events/) - [Case Studies](https://www.systemsengineering.com/case-studies/) - [Client Center](https://www.systemsengineering.com/client-center/) - [CONTACT](https://www.systemsengineering.com/about/contact/) - IT Services - [Managed IT](https://www.systemsengineering.com/managed-it/) - 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FortiGuard, the threat intelligence and research organization at Fortinet, has rated this vulnerability as a Critical Risk.   ### Description A heap-based buffer overflow vulnerability [\[CWE-122\]](https://cwe.mitre.org/data/definitions/122.html) in FortiOS SSL-VPN may allow a remote unauthenticated attacker to execute arbitrary code or commands via specifically crafted requests.  ### Scope Multiple versions of FortiOS v. 5.0.0-7.2.2, and FortiOS-6K7K v. 6.0.0-7.0.7. ### Course of Action Systems Engineering recommends clients who have affected FortiGate systems be patched for these vulnerabilities. For [SE EventWatch](https://www.systemsengineering.com/security/detection-and-response/) and [SE Essentials](https://www.systemsengineering.com/managed-it/it-essentials/) clients, we will be patching these security flaws over the coming weeks to address these critical vulnerabilities proactively. If you are a current [SE EventWatch](https://www.systemsengineering.com/security/detection-and-response/) client, we are consistently monitoring your network to detect, manage, and triage any potential indications of compromise from this, or any other security incidents. 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