What is CVE-2019-5591?

CVE-2019-5591 is a vulnerability in Fortinet Fortios. Published 2020-08-14.

Is CVE-2019-5591 known to be exploited?

Yes. CVE-2019-5591 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 8 public proof-of-concept repositories are indexed.

Vulnerability in Fortinet Fortios

CVE-2019-5591

A Default Configuration vulnerability in FortiOS may allow an unauthenticated attacker on the same subnet to intercept sensitive information by impersonating the LDAP server.

EPSS: 0.506 (97.9th percentile) — read the EPSS interpretation.

Affected products

Fortinet Fortios — versions FortiOS 6.2.0 and below.

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2021-11-03. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-05-03.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

www.fortiguard.com/psirt/FG-IR-19-037 (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2019-5591?: CVE-2019-5591 is a vulnerability in Fortinet Fortios. Published 2020-08-14.
Is CVE-2019-5591 known to be exploited?: Yes. CVE-2019-5591 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 8 public proof-of-concept repositories are indexed.