CVE-2019-5591
Actively exploited. CVE-2019-5591 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2019-5591 is indexed in GitHub PoC and Nuclei. Expect opportunistic scanning and exploitation attempts — prioritize remediation.
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.
CSIRTS triage
- What
- FortiOS contains a default configuration vulnerability that may allow an attacker to intercept sensitive information.
- Who is affected
- Unauthenticated attackers on the same subnet as FortiOS deployments.
- Urgency
- Immediate remediation is necessary due to the critical severity and active exploitation.
- Action
- Reconfigure FortiOS to eliminate the default settings that allow this vulnerability.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 97% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2019-5591 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
- NucleiA nuclei-templates detection/PoC template exists for this CVE.look it up ↗
Advisory coverage (1)
- criticalexploitedCVE-2019-5591: Fortinet FortiOS Default Configuration Vulnerabilitycisa-kev · 2021-11-03
External references
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