Is CVE-2024-55599 in the CISA KEV catalog?

No. CVE-2024-55599 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-55599?

CVE-2024-55599 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2024-55599?

CVE-2024-55599 has an EPSS score of 0.34% (26th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-55599?

Upgrade fortios to 7.4.8 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2024-55599

MEDIUM

5.3

CVSS v3

NVD

Description

An Improperly Implemented Security Check for Standard vulnerability [CWE-358] in FortiOS version 7.6.0, version 7.4.7 and below, 7.0 all versions, 6.4 all versions and FortiProxy version 7.6.1 and below, version 7.4.8 and below, 7.2 all versions, 7.0 all versions may allow a remote unauthenticated user to bypass the DNS filter via Apple devices.

CWE-358

How to fix

Remediation Available

fortiosNVD

Affected:>= 7.4.0, < 7.4.8Fixed in:7.4.8CVE-2024-55599derived from NVD

fortiproxyNVD

Affected:>= 7.6.0, < 7.6.2Fixed in:7.6.2CVE-2024-55599derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.34%probability of exploitation in 30 days

26thpercentile

Low risk: more likely to be exploited than 26% of all known CVEs.

References

Vendor Advisory1

fortiguard.fortinet.com

Other references1

cert-portal.siemens.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-09.