Exploited· due 2022-05-036.5mediumMediumused in ransomware
CVE-2019-5591
Fortinet Fortios
A Default Configuration vulnerability in FortiOS may allow an unauthenticated attacker on the same subnet to intercept sensitive information by impersonating the LDAP server.
Exploitation status
- CISA has confirmed this is being exploited in the wild. That is an observation of real attacks, not a prediction.
- It is known to have been used in ransomware campaigns.
- US federal civilian agencies are required to remediate it by 2022-05-03. That deadline does not bind private companies, but it is a reasonable benchmark for how urgently CISA views it.
- A vendor advisory or patch reference has been published.
Required action
Apply updates per vendor instructions.
CISA’s wording, unedited.
What the metrics mean
- It is reachable only from the same local or logical network.
- For an attacker who can reach it, no special conditions are needed to exploit it.
- To exploit it, no account is needed.
- Beyond that, no action by a user is required.
Scoring
- CVSS
- 6.5 (v3.1)
- Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N- Weakness
- CWE-306
- Assigned by
- psirt@fortinet.com
Dates
- Published
- 2020-08-14
- Last modified
- 2026-08-15
- Added to KEV
- 2021-11-03
- Remediation due
- 2022-05-03
- Sources
- CISA KEV, NVD
Affected products
- Fortinet Fortios- 6.2.0
As listed in the NVD configuration data. Not a statement about your estate.