Overview
Fortinet FortiOS contains a default configuration vulnerability that may allow an unauthenticated attacker on the same subnet to intercept sensitive information by impersonating the Lightweight Directory Access Protocol (LDAP) server.
https://nvd.nist.gov/vuln/detail/CVE-2019-5591
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2019-5591 |
| Vendor / Product | Fortinet — FortiOS |
| NVD Published | 2020-08-14 |
| NVD Last Modified | 2025-10-24 |
| CVSS 3.1 Score | 6.5 |
| CVSS 3.1 Vector | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| Severity | MEDIUM |
| CWE | CWE-306 |
| CISA KEV Added | 2021-11-03 |
| CISA KEV Deadline | 2022-05-03 |
| Known Ransomware Use | No |
CVSS 3.1 Breakdown
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Required Action
CISA BOD 22-01 Deadline: 2022-05-03.
Apply updates per vendor instructions.
Timeline
| Date | Event |
|---|---|
| 2021-11-03 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2022-05-03 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2019-5591 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |