CVE-2018-13383
Fortinet FortiOS and FortiProxy Out-of-bounds Write
n/a
CVSS
33.6%
EPSS (exploit prob.)
98.2%
EPSS percentile
Yes
Actively exploited
Yes
Ransomware use
2022-01-10
Added
Summary
A heap buffer overflow in Fortinet FortiOS and FortiProxy may cause the SSL VPN web service termination for logged in users.
Affected software
Vendor: Fortinet · Product: FortiOS and FortiProxy
Weakness types (CWE):
CWE-787
What to do
This vulnerability appears in CISA's Known Exploited Vulnerabilities catalog, meaning it is being exploited in the wild. Prioritize patching affected systems and verify exposure across your estate.
Related vulnerabilities in Fortinet
| CVE | Name | EPSS | Exploited |
|---|---|---|---|
| CVE-2018-13379 | Fortinet FortiOS SSL VPN Path Traversal Vulnerability | 100.0% | Yes |
| CVE-2022-40684 | Fortinet Multiple Products Authentication Bypass Vulnerability | 100.0% | Yes |
| CVE-2022-42475 | Fortinet FortiOS Heap-Based Buffer Overflow Vulnerability | 99.5% | Yes |
| CVE-2024-55591 | Fortinet FortiOS and FortiProxy Authentication Bypass Vulnerability | 98.3% | Yes |
| CVE-2023-48788 | Fortinet FortiClient EMS SQL Injection Vulnerability | 97.6% | Yes |
| CVE-2025-25257 | Fortinet FortiWeb SQL Injection Vulnerability | 96.7% | Yes |
| CVE-2024-47575 | Fortinet FortiManager Missing Authentication Vulnerability | 94.8% | Yes |
| CVE-2026-21643 | Fortinet FortiClient EMS SQL Injection Vulnerability | 94.1% | Yes |
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