CVE-2024-55590: Multiple improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerabil

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HIGH 8.8UPGRADE

CVE-2024-55590 is a high-severity flaw (CVSS 8.8) affecting fortiisolator. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerabilities [CWE-78] in Fortinet FortiIsolator version 2.4.0 through 2.4.5 allows an authenticated attacker with at least read-only admin permission and CLI access to execute unauthorized code via specifically crafted CLI commands.

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	1.0% (top 37%)
CISA exploited list	No
Weakness	CWE-78
Published	2025-03-11
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

2025-03-11 15:15 UTCPublished CVE record published
2026-06-17 08:11 UTCUpdated Record last modified

fortinet fortiisolator UPGRADE

Affected: >= 2.4.0 and < 2.4.6

Fixed in: 2.4.6

Safe to downgrade to: a release before 2.4.0

1. Check installed version

apt-cache policy fortiisolator || rpm -q fortiisolator || fortiisolator --version

2. UPGRADE to 2.4.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade fortiisolator

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fortiisolator

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2.4.0 (Debian / Ubuntu)

apt-cache madison fortiisolator sudo apt install fortiisolator=<VERSION_BEFORE_2.4.0> sudo apt-mark hold fortiisolator

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list fortiisolator sudo dnf downgrade fortiisolator-<VERSION_BEFORE_2.4.0> sudo dnf versionlock add fortiisolator

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2024-55590?

fortiisolator: upgrade to 2.4.6. Exact commands for each OS are on this page.

Is CVE-2024-55590 being exploited?

CVE-2024-55590 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-2024-55590 affect?

CVE-2024-55590 affects fortiisolator. Severity is high (CVSS 8.8). Multiple improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerabilities [CWE-78] in Fortinet FortiIsolator version 2.4.0 through 2.4.5 allows an authenticated attacker with at least read-only admi

How urgent is CVE-2024-55590?

Priority 47/100. High severity

Software pages

Fortinet vulnerabilities

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References

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