Cyber Resilience

CVE-2024-55599

Fortinet Fortios 6.4.0 – 7.2.11

Published
08 July 2025
Modified
17 June 2026
Patch / advisory
CVSS Score v3.1 5.3
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS Score 0.0034 27th percentile
Risk Priority 44 floored blend · peak EPSS

Summary

CVE-2024-55599 is a medium-severity Improperly Implemented Security Check for Standard (CWE-358) vulnerability in Fortinet Fortios. Its CVSS base score is 5.3 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Downgrade Attack (T1689); ranked at the 27th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability Data

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…

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allow a remote unauthenticated user to bypass the DNS filter via Apple devices.

CWE(s)

Related Threats

MITRE ATT&CK Enterprise Techniques

T1689 Downgrade Attack Defense Impairment
Adversaries may downgrade or use a version of system features that may be outdated, vulnerable, and/or does not support updated security controls.
T1557 Adversary-in-the-Middle Credential Access
Adversaries may attempt to position themselves between two or more networked devices using an adversary-in-the-middle (AiTM) technique to support follow-on behaviors such as [Network Sniffing](https://attack.
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-33510Same product: Fortinet Fortios
CVE-2025-25255Same product: Fortinet Fortios
CVE-2025-47890Same product: Fortinet Fortios
CVE-2025-31366Same product: Fortinet Fortios
CVE-2025-24471Same product: Fortinet Fortios
CVE-2025-25253Same product: Fortinet Fortios
CVE-2023-29175Same product: Fortinet Fortios
CVE-2024-50568Same product: Fortinet Fortios
CVE-2023-26207Same product: Fortinet Fortios
CVE-2024-23111Same product: Fortinet Fortios

Affected Assets

fortinet
fortiproxy
7.0.0 — 7.4.9 · 7.6.0 — 7.6.2
fortinet
fortisase
24.4.32
fortinet
fortios
7.6.0 · 6.4.0 — 7.2.11 · 7.4.0 — 7.4.8

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

Detect
Catch it (NIST detect / respond)

Harden
Shrink the surface (DISA STIG)

Validate
Prove the fix (OWASP ASVS)
  • V17.2.8

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

addresses: CWE-358

Assessments identify and document improperly implemented security checks, allowing fixes that reduce exploitation of flawed checks.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require correct implementation of standardized security checks and algorithms.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

finds

Security testing in development and acceptance validates that required security checks function as specified.

prevents

Use of cryptography control depends on correct implementation of standardized cryptographic checks.

prevents

Secure development life cycle mandates verification that security checks required by standards are correctly implemented.

prevents

Application security requirements explicitly call for correct implementation of standardized security mechanisms.

prevents

Secure system architecture and engineering principles require faithful realization of protocol-level security checks.

prevents

Secure coding practices directly address correct implementation of security-relevant checks in standardized algorithms.

References