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CVE Record

CVE-2019-5593: Improper permission or value checking in the CLI console may allow a non-privileged user to obtain Fortinet...

Improper permission or value checking in the CLI console may allow a non-privileged user to obtain Fortinet FortiOS plaint text private keys of system's builtin local certificates via unsetting the keys encryption password in FortiOS 6.2.0, 6.0.0 to 6.0.6, 5.6.10 and below or for user uploaded local certificates via setting an empty password in FortiOS 6.2.1, 6.2.0, 6.0.6 and below.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A logged-in, non-privileged FortiOS user may be able to reveal plaintext private keys for local certificates. That can weaken trust in the firewall’s certificates and may require certificate replacement if exposure is confirmed. The public bundle does not provide CVSS, confirmed exploitation, or detailed remediation text.

Executive priority

Prioritize FortiOS appliances where lower-privileged users have CLI access or where local certificates protect remote access, management, or trusted services. Treat confirmed private key exposure as a credential compromise requiring certificate rotation.

Technical view

CVE-2019-5593 is an improper permission or value-checking issue in the FortiOS CLI console affecting built-in and user-uploaded local certificates across listed FortiOS versions. The described impact is plaintext private key disclosure by manipulating certificate key password handling. Evidence indicates an authenticated, non-privileged CLI context is required.

Likely exposure

Organizations running Fortinet FortiOS 6.2.0 to 6.2.1, 6.0.6 and below, or 5.6.10 and below may be exposed, depending on certificate type. Exposure is most relevant where non-privileged CLI accounts exist.

Exploitation context

The source bundle does not indicate active exploitation, and CISA KEV status is false. The described attacker already has non-privileged CLI access, so this is not presented as unauthenticated remote compromise.

Researcher notes

The bundle lacks CVSS, CWE, detailed fixed versions, and exploitability detail beyond the CVE description. Analysis should stay anchored to Fortinet’s PSIRT advisory and avoid assuming unauthenticated reachability, public exploit availability, or universal certificate compromise.

Mitigation direction

  • Check Fortinet PSIRT FG-IR-19-134 for fixed versions and upgrade guidance.
  • Inventory affected FortiOS versions and certificate usage on managed appliances.
  • Restrict non-privileged CLI access until remediation is complete.
  • Rotate exposed local certificates if private key access is suspected.
  • Review accounts with CLI access and remove unnecessary access.

Validation and detection

  • Identify FortiOS appliances running the affected version ranges.
  • Confirm whether non-privileged users have CLI console access.
  • Review local certificate inventory for built-in and user-uploaded certificates.
  • Check logs for unusual certificate configuration or password changes.
  • Verify Fortinet advisory guidance before marking systems remediated.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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description · low confidence lookup

Credential and access behavior lookup

The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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cve · low confidence lookup

CVE-2019-5593 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/aFortinet FortiOSFortiOS 6.2.0 to 6.2.1, 6.0.6 and belowListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.