CVE-2024-23663: An improper access control in Fortinet FortiExtender 4.1.1 - 4.1.9, 4.2.0 - 4.2.6, 5.3.2, 7.0.0 - 7.0.4, 7.2.0

Q: How do I fix CVE-2024-23663?

fortiextender firmware: upgrade to newer than 7.4.2. Exact commands for each OS are on this page.

Q: Is CVE-2024-23663 being exploited?

CVE-2024-23663 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-23663 affect?

CVE-2024-23663 affects fortiextender firmware. Severity is high (CVSS 8.8). An improper access control in Fortinet FortiExtender 4.1.1 - 4.1.9, 4.2.0 - 4.2.6, 5.3.2, 7.0.0 - 7.0.4, 7.2.0 - 7.2.4 and 7.4.0 - 7.4.2 allows an attacker to create users with elevated privileges via a crafted HTTP request.

This month

HIGH 8.8UPGRADE

CVE-2024-23663 is a high-severity flaw (CVSS 8.8) affecting fortiextender firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An improper access control in Fortinet FortiExtender 4.1.1 - 4.1.9, 4.2.0 - 4.2.6, 5.3.2, 7.0.0 - 7.0.4, 7.2.0 - 7.2.4 and 7.4.0 - 7.4.2 allows an attacker to create users with elevated privileges via a crafted HTTP request.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.6% (top 49%)
CISA exploited list	No
Weakness	CWE-284
Published	2024-07-09
Last modified	2026-06-17

Publisher (CNA): Fortinet, Inc. · Vendor: fortinet

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-07-09 16:15 UTCPublished CVE record published
2026-06-17 07:13 UTCUpdated Record last modified

fortinet fortiextender firmware UPGRADE

Affected: >= 4.1.1 and <= 4.1.9 · >= 4.2.0 and <= 4.2.6 · >= 7.0.0 and <= 7.0.4 · >= 7.2.0 and <= 7.2.4 · >= 7.4.0 and <= 7.4.2 · 5.3.2

Fixed in: newer than 7.4.2

Safe to downgrade to: a release before 4.1.1

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-23663?

fortiextender firmware: upgrade to newer than 7.4.2. Exact commands for each OS are on this page.

Is CVE-2024-23663 being exploited?

CVE-2024-23663 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-23663 affect?

CVE-2024-23663 affects fortiextender firmware. Severity is high (CVSS 8.8). An improper access control in Fortinet FortiExtender 4.1.1 - 4.1.9, 4.2.0 - 4.2.6, 5.3.2, 7.0.0 - 7.0.4, 7.2.0 - 7.2.4 and 7.4.0 - 7.4.2 allows an attacker to create users with elevated privileges via a crafted HTTP request.

How urgent is CVE-2024-23663?

Priority 43/100. High severity

Software pages

Fortinet vulnerabilities

Related CVEs

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References

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