CVE-2019-6693 — Fortinet FortiOS Use of Hard-Coded Credentials Vulnerability

Use of a hard-coded cryptographic key to cipher sensitive data in FortiOS configuration backup file may allow an attacker with access to the backup file to decipher the sensitive data, via knowledge of the hard-coded key. The aforementioned sensitive data includes users' pas

01What is this vulnerability?

Use of a hard-coded cryptographic key to cipher sensitive data in FortiOS configuration backup file may allow an attacker with access to the backup file to decipher the sensitive data, via knowledge of the hard-coded key. The aforementioned sensitive data includes users' passwords (except the administrator's password), private keys' passphrases and High Availability password (when set).

02Affected products

Vendor	Product	Versions
Fortinet	FortiGate	5.6.9 and below, 6.0.5 and below, 6.2.0

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2025-06-25. Ransomware use: Known.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-11-21T15:08:05.000Z
• Last modified: 2025-10-21T23:35:57.795Z
• Added to CISA KEV: 2025-06-25
• BOD 22-01 due: 2025-07-16

09References

• fortiguard.com — https://fortiguard.com/advisory/FG-IR-19-007