CVE-2023-40718

HIGHNVD 7.57.5—

7.5

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.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 9.5%
KEV: Not listed

Published

October 10, 2023

Last Modified

November 21, 2024

References (2)

psirt@fortinethttps://fortiguard.com/psirt/FG-IR-23-090
af854a3a-2127-422b-91ae-364da2661108https://fortiguard.com/psirt/FG-IR-23-090

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-436Interpretation Conflict

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
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2026-05-29 13:43 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-24 16:11 UTCEG score recompute

Frequently asked(5)

What is CVE-2023-40718?

CVE-2023-40718 is a high vulnerability published on October 10, 2023. 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.

When was CVE-2023-40718 disclosed?

CVE-2023-40718 was first published in the National Vulnerability Database on October 10, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-40718 actively exploited?

CVE-2023-40718 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-40718?

CVE-2023-40718 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2023-40718?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-40718, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2023-40718

📅 Published

🔄 Last Modified

🔗 References (2)