OS command injection in Fortinet FortiWeb
Priority MEDIUM 40CWE-78Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-78.
Summary
Multiple improper neutralization of special elements used in a command vulnerabilities [CWE-77] in FortiWeb management interface 6.4.1 and below, 6.3.15 and below, 6.2.5 and below may allow an authenticated attacker to execute unauthorized code or commands via crafted parameters of HTTP requests.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01154 67th 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 FortiWeb | FortiWeb 6.4.1 and below, 6.3.15 and below, 6.2.5 and below | — | No fix listed | CNA |
- Fortinet FortiWeb VendorFortinet Affected FortiWeb 6.4.1 and below, 6.3.15 and below, 6.2.5 and below Fixed in — No fix listed CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:* | 5.8.0 – 5.8.6; 6.0.0 – 6.0.7; 6.2.0 – 6.2.5; 6.3.0 – 6.3.15 | Vulnerable | Fortinet |
| cpe:2.3:a:fortinet:fortiweb:5.9.0:*:*:*:*:*:*:* | 5.9.0 | Vulnerable | Fortinet |
| cpe:2.3:a:fortinet:fortiweb:5.9.1:*:*:*:*:*:*:* | 5.9.1 | Vulnerable | Fortinet |
| cpe:2.3:a:fortinet:fortiweb:6.1.0:*:*:*:*:*:*:* | 6.1.0 | Vulnerable | Fortinet |
| cpe:2.3:a:fortinet:fortiweb:6.1.1:*:*:*:*:*:*:* | 6.1.1 | Vulnerable | Fortinet |
| cpe:2.3:a:fortinet:fortiweb:6.4.0:*:*:*:*:*:*:* | 6.4.0 | Vulnerable | Fortinet |
| cpe:2.3:a:fortinet:fortiweb:6.4.1:*:*:*:*:*:*:* | 6.4.1 | Vulnerable | Fortinet |
- cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:* Versions 5.8.0 – 5.8.6; 6.0.0 – 6.0.7; 6.2.0 – 6.2.5; 6.3.0 – 6.3.15 Vulnerable ·Fortinet
- cpe:2.3:a:fortinet:fortiweb:5.9.0:*:*:*:*:*:*:* Versions 5.9.0 Vulnerable ·Fortinet
- cpe:2.3:a:fortinet:fortiweb:5.9.1:*:*:*:*:*:*:* Versions 5.9.1 Vulnerable ·Fortinet
- cpe:2.3:a:fortinet:fortiweb:6.1.0:*:*:*:*:*:*:* Versions 6.1.0 Vulnerable ·Fortinet
- cpe:2.3:a:fortinet:fortiweb:6.1.1:*:*:*:*:*:*:* Versions 6.1.1 Vulnerable ·Fortinet
- cpe:2.3:a:fortinet:fortiweb:6.4.0:*:*:*:*:*:*:* Versions 6.4.0 Vulnerable ·Fortinet
- cpe:2.3:a:fortinet:fortiweb:6.4.1:*:*:*:*:*:*:* Versions 6.4.1 Vulnerable ·Fortinet
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-36180
- 2026-10-03 Alias added: GHSA-c439-xxv3-pcx2
References
More Fortinet Fortiweb vulnerabilities
- TI-2026-20057 Authentication bypass in Fortinet FortiWeb KEVCVSS 3.1CRITICAL 9.4
- TI-2025-39856 Path traversal in Fortinet FortiWeb KEVCVSS 3.1CRITICAL 9.4
- TI-2025-18919 SQL injection in Fortinet FortiWeb KEVCVSS 3.1CRITICAL 9.8
- TI-2025-35886 OS command injection in Fortinet FortiWeb KEVCVSS 3.1MEDIUM 6.7
- TI-2021-05113 OS command injection in Fortinet FortiWeb CVSS 3.1HIGH 8.8
- TI-2021-18960 Stack-based buffer overflow in Fortinet FortiWeb CVSS 3.1CRITICAL 9.8
Sources
- CVE-2021-36180 · CVE Program
- CVE-2021-36180 · NVD
- FIRST EPSS
- GHSA-c439-xxv3-pcx2 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences