CVE-2023-40718

Name: CVE-2023-40718
Creator: NVD / NIST
Published: 2023-10-10T17:15:12.56+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.42%

Last modified Jun 17, 2026

CVE-2023-40718 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.42% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Probability

0.42%

33.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Fortinet	Fortios Ips Engine	<= 7.312
Fortinet	Fortios Ips Engine	<= 7.165
Fortinet	Fortios Ips Engine	<= 6.158

References

https://fortiguard.com/psirt/FG-IR-23-090Vendor Advisory
https://fortiguard.com/psirt/FG-IR-23-090Vendor Advisory

Timeline

Published: Oct 10, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-40718?

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.

How severe is CVE-2023-40718?

CVE-2023-40718 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.42% probability of exploitation in the next 30 days.

How do I fix CVE-2023-40718?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-40718?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST