CVE-2026-39809: A improper neutralization of special elements used in an sql command ('sql injection') vulnerability in Fortin

Routine

MEDIUM 6.7UPGRADE

CVE-2026-39809 is a medium-severity flaw (CVSS 6.7) affecting forticlientems. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A improper neutralization of special elements used in an sql command ('sql injection') vulnerability in Fortinet FortiClientEMS 7.4.0 through 7.4.5, FortiClientEMS 7.2.0 through 7.2.12, FortiClientEMS 7.0 all versions may allow attacker to execute unauthorized code or commands via sending crafted requests

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.7 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.1% (top 97%)
CISA exploited list	No
Weakness	CWE-89
Published	2026-04-14
Last modified	2026-10-26

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

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-14 16:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

fortinet forticlientems UPGRADE

Affected: >= 7.0.0 and <= 7.0.13 · >= 7.2.0 and < 7.2.13 · >= 7.4.0 and < 7.4.6

Fixed in: 7.2.13, 7.4.6

Safe to downgrade to: a release before 7.0.0

1. Check installed version

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

2. UPGRADE to 7.2.13 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade forticlientems

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 7.0.0 (Debian / Ubuntu)

apt-cache madison forticlientems sudo apt install forticlientems=<VERSION_BEFORE_7.0.0> sudo apt-mark hold forticlientems

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

dnf --showduplicates list forticlientems sudo dnf downgrade forticlientems-<VERSION_BEFORE_7.0.0> sudo dnf versionlock add forticlientems

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-2026-39809?

forticlientems: upgrade to 7.2.13, 7.4.6. Exact commands for each OS are on this page.

Is CVE-2026-39809 being exploited?

CVE-2026-39809 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-2026-39809 affect?

CVE-2026-39809 affects forticlientems. Severity is medium (CVSS 6.7). A improper neutralization of special elements used in an sql command ('sql injection') vulnerability in Fortinet FortiClientEMS 7.4.0 through 7.4.5, FortiClientEMS 7.2.0 through 7.2.12, FortiClientEMS 7.0 all versions may allow attacker to

How urgent is CVE-2026-39809?

Priority 24/100. No elevated risk signals yet.

Software pages

Fortinet vulnerabilities

Related CVEs

CVE-2026-39810 MEDIUM 6.0 UPGRADE A use of hard-coded cryptographic key vulnerability in Fortinet FortiClientEMS 7.4.0 through 7.4.5 may allow a
CVE-2026-59836 HIGH 7.5 UPGRADE A improper certificate validation vulnerability in Fortinet FortiClientEMS 7.4.3 through 7.4.5, FortiClientEMS

References

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