ACTIVELY EXPLOITED
CVE-2018-13383: Fortinet FortiOS and FortiProxy Out-of-bounds Write
| Vendor | Fortinet |
|---|---|
| Product | FortiOS and FortiProxy |
| Actively exploited | Yes |
| Added to CISA KEV | 10 Jan 2022 |
| CISA federal deadline | 10 Jul 2022 |
| Ransomware use | Known |
| Weakness (CWE) | CWE-787 |
Required action (CISA's text)
Apply updates per vendor instructions.
Description (NVD)
A heap buffer overflow in Fortinet FortiOS and FortiProxy may cause the SSL VPN web service termination for logged in users.
SOURCES
Other Fortinet flaws
- CVE-2025-61624: Fortinet Multiple Products Path Traversal Vulnerability
- CVE-2026-104286: Fortinet FortiMail Path Traversal Vulnerability
- CVE-2025-25249: Fortinet Multiple Products Heap-based Buffer Overflow Vulnerability
- CVE-2025-68686: Fortinet FortiOS Exposure of Sensitive Information to an Unauthorized Actor Vulnerability
- CVE-2026-39808: Fortinet FortiSandbox OS Command Injection Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.