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CVE-2023-40718

23
FAUCET Score

CVE-2023-40718 is a high-severity interpretation conflict vulnerability (CVSS 7.5) in Fortinet IPS Engine versions 7.321, 7.166, and 6.158, affecting FortiOS and FortiOS_IPS_Engine. This flaw allows an unauthenticated attacker to evade IPS features by sending specially crafted TCP packets, leading to a high impact on integrity without requiring user interaction. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 7.312CPE matchmatch criteria
cpe:2.3:a:fortinet:fortios_ips_engine:*:*:*:*:*:*:*:*
<= 7.165CPE matchmatch criteria
cpe:2.3:a:fortinet:fortios_ips_engine:*:*:*:*:*:*:*:*
<= 6.158CPE matchmatch criteria
cpe:2.3:a:fortinet:fortios_ips_engine:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.42%
Probability of exploitation in next 30 days
EPSS Percentile
34.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0042 is in the 13th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

fortinetvendor investigatingvia nvd_reference
View patch

References

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