A interpretation conflict in Fortinet IPS Engine versions 7.321, 7.166 and 6.158 allows…
Priority MEDIUM 40CWE-436Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
A interpretation conflict in Fortinet IPS Engine versions 7.321, 7.166 and 6.158 allows attacker to evade IPS features via crafted TCP packets.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00534 45th 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
- Yes
- 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 | IPS Engine | 7.321; 7.166; 6.158 | — | No fix listed | CNA |
- IPS Engine VendorFortinet Affected 7.321; 7.166; 6.158 Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:fortinet:fortios_ips_engine:*:*:*:*:*:*:*:* | up to 7.312 | Vulnerable | Fortinet |
| cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* | 7.2.0 to before 7.2.4 | Running on | Fortinet |
| cpe:2.3:a:fortinet:fortios_ips_engine:*:*:*:*:*:*:*:* | up to 7.165 | Vulnerable | Fortinet |
| cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* | 7.0.0 to before 7.0.12 | Running on | Fortinet |
| cpe:2.3:a:fortinet:fortios_ips_engine:*:*:*:*:*:*:*:* | up to 6.158 | Vulnerable | Fortinet |
| cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* | 6.4.0 to before 6.4.13 | Running on | Fortinet |
- cpe:2.3:a:fortinet:fortios_ips_engine:*:*:*:*:*:*:*:* Versions up to 7.312 Vulnerable ·Fortinet
- cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* Versions 7.2.0 to before 7.2.4 Running on ·Fortinet
- cpe:2.3:a:fortinet:fortios_ips_engine:*:*:*:*:*:*:*:* Versions up to 7.165 Vulnerable ·Fortinet
- cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* Versions 7.0.0 to before 7.0.12 Running on ·Fortinet
- cpe:2.3:a:fortinet:fortios_ips_engine:*:*:*:*:*:*:*:* Versions up to 6.158 Vulnerable ·Fortinet
- cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* Versions 6.4.0 to before 6.4.13 Running on ·Fortinet
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-40718
- 2026-10-03 Alias added: GHSA-hgv6-x3p4-q38v
- 2026-10-11 Priority changed: LOW → MEDIUM
References
More Fortinet Fortios Ips Engine vulnerabilities
- TI-2019-03957 Improper signature verification in Fortinet IPS Engine CVSS 3.1MEDIUM 5.9
Sources
- CVE-2023-40718 · CVE Program
- CVE-2023-40718 · NVD
- FIRST EPSS
- GHSA-hgv6-x3p4-q38v · 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