Improper input validation in Fortinet FortiOS
Priority LOW 32CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA.
Summary
A Denial of Service (DoS) vulnerability in Fortinet FortiOS 5.4.0 to 5.4.5 allows an authenticated user to cause the web GUI to be temporarily unresponsive, via passing a specially crafted payload to the 'params' parameter of the JSON web API.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01745 77th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Fortinet | Fortinet FortiOS | FortiOS 5.4.5, 5.4.4, 5.4.3, 5.4.2, 5.4.1, 5.4.0 | — | No fix listed | CNA |
- Fortinet FortiOS VendorFortinet Affected FortiOS 5.4.5, 5.4.4, 5.4.3, 5.4.2, 5.4.1, 5.4.0 Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:fortinet:fortios:5.4.0:*:*:*:*:*:*:* | 5.4.0 | Vulnerable | Fortinet |
| cpe:2.3:o:fortinet:fortios:5.4.1:*:*:*:*:*:*:* | 5.4.1 | Vulnerable | Fortinet |
| cpe:2.3:o:fortinet:fortios:5.4.2:*:*:*:*:*:*:* | 5.4.2 | Vulnerable | Fortinet |
| cpe:2.3:o:fortinet:fortios:5.4.3:*:*:*:*:*:*:* | 5.4.3 | Vulnerable | Fortinet |
| cpe:2.3:o:fortinet:fortios:5.4.4:*:*:*:*:*:*:* | 5.4.4 | Vulnerable | Fortinet |
| cpe:2.3:o:fortinet:fortios:5.4.5:*:*:*:*:*:*:* | 5.4.5 | Vulnerable | Fortinet |
- cpe:2.3:o:fortinet:fortios:5.4.0:*:*:*:*:*:*:* Versions 5.4.0 Vulnerable ·Fortinet
- cpe:2.3:o:fortinet:fortios:5.4.1:*:*:*:*:*:*:* Versions 5.4.1 Vulnerable ·Fortinet
- cpe:2.3:o:fortinet:fortios:5.4.2:*:*:*:*:*:*:* Versions 5.4.2 Vulnerable ·Fortinet
- cpe:2.3:o:fortinet:fortios:5.4.3:*:*:*:*:*:*:* Versions 5.4.3 Vulnerable ·Fortinet
- cpe:2.3:o:fortinet:fortios:5.4.4:*:*:*:*:*:*:* Versions 5.4.4 Vulnerable ·Fortinet
- cpe:2.3:o:fortinet:fortios:5.4.5:*:*:*:*:*:*:* Versions 5.4.5 Vulnerable ·Fortinet
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2017-14182
- 2026-10-03 Alias added: GHSA-663g-ww93-9qmp
References
More Fortinet Fortios vulnerabilities
- TI-2026-20057 Authentication bypass in Fortinet FortiWeb KEVCVSS 3.1CRITICAL 9.4
- TI-2025-18911 Heap-based buffer overflow in Fortinet FortiSwitchManager KEVCVSS 3.1CRITICAL 9.8
- TI-2024-36904 Authentication bypass in Fortinet FortiOS KEVCVSS 3.1CRITICAL 9.8
- TI-2024-15234 A use of externally-controlled format string in Fortinet FortiOS versions 7.4.0 through… KEVCVSS 3.1CRITICAL 9.8
- TI-2024-14448 Out-of-bounds write in Fortinet FortiOS KEVCVSS 3.1CRITICAL 9.8
- TI-2023-12585 Heap-based buffer overflow in Fortinet FortiOS-6K7K KEVCVSS 3.1CRITICAL 9.8
Sources
- CVE-2017-14182 · CVE Program
- CVE-2017-14182 · NVD
- FIRST EPSS
- GHSA-663g-ww93-9qmp · GitHub Advisory Database · CC BY 4.0
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