Known exploited · Fortinet
CVE-2019-6693: Fortinet FortiOS Use of Hard-Coded Credentials Vulnerability
What it is
Fortinet FortiOS contains a use of hard-coded credentials vulnerability that could allow an attacker to cipher sensitive data in FortiOS configuration backup file via knowledge of the hard-coded key.
- Vendor
- Fortinet
- Product
- FortiOS
- Added to KEV
- June 25, 2025
- CISA due date
- July 16, 2025
- Ransomware use
- Known
What CISA requires
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Forensic triage
No
What to do now
- Find every instance of FortiOS you run, including the forgotten ones, and check its version against the vendor advisory.
- Apply the vendor's fix or mitigation, before July 16, 2025 if you are bound by CISA's deadline, sooner if it faces the internet.
- Assume it was tried against you already: look for signs of exploitation from the date it was added, not from the day you patched.
References
H2 Security
Not sure you are clear?
We check where you run it, patch or mitigate with your team, and look for signs it was already used against you.
Talk to our teamT Academy
Train the engineers who fix it
Security engineering on real hosts in the browser, every objective checked on the machine. The first two lessons of Linux 1 are free.
Start freeSource: CISA Known Exploited Vulnerabilities Catalog (public domain), catalog version 2026.10.01.