CVE-2024-36505

File integrity bypass via ineffective write protection

Published Aug 13, 2024 · Updated Aug 15, 2024

Improper access control in affected Fortinet FortiOS releases allows attackers to bypass real-time file integrity checks via local write access. The real-time integrity layer fails to enforce write protection on protected system files, allowing unauthorized changes to evade its checks. Exploitation requires write access to the underlying system obtained through another flaw, and successful abuse permits protected files to be altered without detection.

CVSS severity5.1
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in affected Fortinet FortiOS releases allows attackers to bypass real-time file integrity checks via local write access. The real-time integrity layer fails to enforce write protection on protected system files, allowing unauthorized changes to evade its checks. Exploitation requires write access to the underlying system obtained through another flaw, and successful abuse permits protected files to be altered without detection.

The record

CVE
CVE-2024-36505
Published
Aug 13, 2024
Updated
Aug 15, 2024
Vendor
Fortinet
Product
FortiOS
Classifications
CWE-284, T1562.001
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.4.13 <=6.4.15
  2. Affected versionversion=7.0.12 <=7.0.14
  3. Affected versionversion=7.2.5 <=7.2.7
  4. Affected versionversion=7.4.0 <=7.4.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Fortinet · FortiOSversion=6.4.13 <=6.4.15; version=7.0.12 <=7.0.14; version=7.2.5 <=7.2.7; version=7.4.0 <=7.4.3

Published CVSS scores

5.1Fortinet, Inc.CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1562.001Impair Defenses: Disable or Modify Tools

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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