Overview
A heap buffer overflow in Fortinet FortiOS and FortiProxy may cause the SSL VPN web service termination for logged in users.
https://nvd.nist.gov/vuln/detail/CVE-2018-13383
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2018-13383 |
| Vendor / Product | Fortinet — FortiOS and FortiProxy |
| NVD Published | 2019-05-29 |
| NVD Last Modified | 2025-10-24 |
| CVSS 3.1 Score | 4.3 |
| CVSS 3.1 Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
| Severity | MEDIUM |
| CWE | CWE-787 |
| CISA KEV Added | 2022-01-10 |
| CISA KEV Deadline | 2022-07-10 |
| Known Ransomware Use | ⚠️ Yes |
CVSS 3.1 Breakdown
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Required Action
CISA BOD 22-01 Deadline: 2022-07-10.
Apply updates per vendor instructions.
Timeline
| Date | Event |
|---|---|
| 2022-01-10 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2022-07-10 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2018-13383 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |