CVE-2019-5593

Private-key disclosure via empty encryption passwords

Published Jan 23, 2020 · Updated Oct 25, 2024

Information disclosure in the CLI console in Fortinet FortiOS 6.2.1 and earlier allows local users to obtain plaintext certificate private keys. The console accepts removal of the encryption password for built-in certificate keys or an empty password for uploaded certificate keys without enforcing permission and value constraints. Exploitation requires a non-privileged CLI account and exposes certificate authentication material, without reported integrity or availability impact.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in the CLI console in Fortinet FortiOS 6.2.1 and earlier allows local users to obtain plaintext certificate private keys. The console accepts removal of the encryption password for built-in certificate keys or an empty password for uploaded certificate keys without enforcing permission and value constraints. Exploitation requires a non-privileged CLI account and exposes certificate authentication material, without reported integrity or availability impact.

The record

CVE
CVE-2019-5593
Published
Jan 23, 2020
Updated
Oct 25, 2024
Vendor
Fortinet
Product
FortiOS
Classifications
CWE-755, T1552.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 23, 2020CVE publishedPublication date reported by the CVE source.
  2. Oct 25, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=FortiOS 6.2.0 to 6.2.1, 6.0.6 and below

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Fortinet · FortiOSversion=FortiOS 6.2.0 to 6.2.1, 6.0.6 and below

Published CVSS scores

2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-755Improper Handling of Exceptional Conditions
T1552.004Unsecured Credentials: Private Keys

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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