CVE-2019-5591
Detail
Description
A Default Configuration vulnerability in FortiOS may allow an unauthenticated attacker on the same subnet to intercept sensitive information by impersonating the LDAP server.
Metrics
CVSS Version 4.0
CVSS Version 3.x
CVSS Version 2.0
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
CVSS 4.0 Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 3.x Severity and Vector Strings:
Vector:
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0 Severity and Vector Strings:
Vector:
(AV:A/AC:L/Au:N/C:P/I:N/A:N)
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This CVE is in CISA's Known Exploited Vulnerabilities Catalog
Reference
CISA's BOD 22-01 and Known
Exploited Vulnerabilities Catalog for further guidance and requirements.
Vulnerability Name
Date Added
Due Date
Required Action
Fortinet FortiOS Default Configuration Vulnerability
11/03/2021
05/03/2022
Apply updates per vendor instructions.
Weakness Enumeration
CWE-ID
CWE Name
Source
CWE-306
Missing Authentication for Critical Function
NIST
CISA-ADP
Change History
16 change records found show changes
CVE Modified by CISA-ADP
8/15/2026 12:17:41 AM
Action
Type
Old Value
New Value
Changed
SSVC
{"timestamp":"2024-10-23T13:30:04.066109Z","id":"CVE-2019-5591","options":[{"exploitation":"active"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}
{"timestamp":"2021-04-22T00:00:00+00:00","id":"CVE-2019-5591","options":[{"exploitation":"active"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}
CVE Modified by CISA-ADP
6/16/2026 10:37:54 PM
Action
Type
Old Value
New Value
Added
SSVC
{"timestamp":"2024-10-23T13:30:04.066109Z","id":"CVE-2019-5591","options":[{"exploitation":"active"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}
CVE Modified by Fortinet, Inc.
6/16/2026 10:37:54 PM
Action
Type
Old Value
New Value
Added
Affected
[{"vendor":"Fortinet","product":"Fortinet FortiOS","versions":[{"version":"FortiOS 6.2.0 and below.","status":"affected"}]}]
Modified Analysis by NIST
10/24/2025 8:54:02 AM
Action
Type
Old Value
New Value
Added
Reference Type
CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-5591 Types: US Government Resource
CVE Modified by CISA-ADP
10/21/2025 8:16:43 PM
Action
Type
Old Value
New Value
Added
Reference
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-5591
CVE Modified by CISA-ADP
10/21/2025 4:17:36 PM
Action
Type
Old Value
New Value
Removed
Reference
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-5591
CVE Modified by CISA-ADP
10/21/2025 3:17:57 PM
Action
Type
Old Value
New Value
Added
Reference
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-5591
Modified Analysis by NIST
2/06/2025 11:07:11 AM
Action
Type
Old Value
New Value
CVE Modified by CVE
11/20/2024 11:45:11 PM
Action
Type
Old Value
New Value
Added
Reference
https://www.fortiguard.com/psirt/FG-IR-19-037
Modified Analysis by NIST
10/24/2024 9:55:59 AM
Action
Type
Old Value
New Value
Changed
Reference Type
https://www.fortiguard.com/psirt/FG-IR-19-037 Vendor Advisory
https://www.fortiguard.com/psirt/FG-IR-19-037 Mitigation, Vendor Advisory
CVE Modified by CISA-ADP
10/23/2024 10:35:05 AM
Action
Type
Old Value
New Value
Added
CVSS V3.1
CISA-ADP AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Added
CWE
CISA-ADP CWE-306
CVE Modified by Fortinet, Inc.
5/14/2024 2:03:05 AM
Action
Type
Old Value
New Value
CWE Remap by NIST
7/21/2021 7:39:23 AM
Action
Type
Old Value
New Value
Changed
CWE
CWE-200
CWE-306
Modified Analysis by NIST
4/12/2021 3:31:33 PM
Action
Type
Old Value
New Value
Added
CVSS V3.1
NIST AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Removed
CVSS V3.1
NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Added
CVSS V2
NIST (AV:A/AC:L/Au:N/C:P/I:N/A:N)
Removed
CVSS V2
NIST (AV:N/AC:L/Au:N/C:P/I:N/A:N)
Changed
Reference Type
https://www.fortiguard.com/psirt/FG-IR-19-037 No Types Assigned
https://www.fortiguard.com/psirt/FG-IR-19-037 Vendor Advisory
CVE Modified by Fortinet, Inc.
4/07/2021 5:15:15 PM
Action
Type
Old Value
New Value
Added
Reference
https://www.fortiguard.com/psirt/FG-IR-19-037 [No Types Assigned]
Removed
Reference
https://fortiguard.com/advisory/FG-IR-19-037 [Vendor Advisory]
Initial Analysis by NIST
8/20/2020 1:50:00 PM
Action
Type
Old Value
New Value
Added
CVSS V3.1
NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Added
CVSS V2
NIST (AV:N/AC:L/Au:N/C:P/I:N/A:N)
Added
CWE
NIST CWE-200
Added
CPE Configuration
OR
*cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* versions up to (including) 6.2.0
Changed
Reference Type
https://fortiguard.com/advisory/FG-IR-19-037 No Types Assigned
https://fortiguard.com/advisory/FG-IR-19-037 Vendor Advisory
Quick Info
CVE Dictionary Entry: CVE-2019-5591 NVD
Published Date: 08/14/2020 NVD
Last Modified: 08/15/2026
Source: Fortinet, Inc.