CVE-2023-40721

MEDIUMNVD 6.76.7—Trending — 3 sources updated this week

6.7

A use of externally-controlled format string vulnerability [CWE-134] vulnerability in Fortinet allows a privileged attacker to execute arbitrary code or commands via specially crafted requests.

CVSS v3: 6.7
EG Score: 6.7(medium)
EPSS: 6.1%
KEV: Not listed

Published

February 11, 2025

Last Modified

January 14, 2026

References (1)

psirt@fortinethttps://fortiguard.com/psirt/FG-IR-23-261

Weakness Classification(1)

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

CWE-134Use of Externally-Controlled Format String

Data Freshness Timeline

(refreshed 12× in last 7d / 12× 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
2026-05-31 00:15 UTCepss_batch
2026-05-30 12:01 UTCEG score recompute
2026-05-30 12:01 UTCGHSA enrichment
2026-05-29 13:43 UTCepss_batch
2026-05-29 13:43 UTCepss_batch

Frequently asked(5)

What is CVE-2023-40721?

CVE-2023-40721 is a medium vulnerability published on February 11, 2025. A use of externally-controlled format string vulnerability [CWE-134] vulnerability in Fortinet allows a privileged attacker to execute arbitrary code or commands via specially crafted requests.

When was CVE-2023-40721 disclosed?

CVE-2023-40721 was first published in the National Vulnerability Database on February 11, 2025, with the most recent update on January 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-40721 actively exploited?

CVE-2023-40721 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 6.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-40721?

CVE-2023-40721 has a CVSS v3 base score of 6.7 (NVD).

How do I remediate CVE-2023-40721?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-40721, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-40721

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CVE-2023-40721

📅 Published

🔄 Last Modified

🔗 References (1)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-40721?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (1)

Frequently asked(5)

Related CVEs(same CWE)