CVE-2026-39810: A use of hard-coded cryptographic key vulnerability in Fortinet FortiClientEMS 7.4.0 through 7.4.5 may allow a

Routine

MEDIUM 6.0UPGRADE

CVE-2026-39810 is a medium-severity flaw (CVSS 6.0) affecting forticlientems. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A use of hard-coded cryptographic key vulnerability in Fortinet FortiClientEMS 7.4.0 through 7.4.5 may allow attacker to information disclosure via decrypting database dump.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.0 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.1% (top 99%)
CISA exploited list	No
Weakness	CWE-321
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: >= 7.4.0 and < 7.4.6

Fixed in: 7.4.6

Safe to downgrade to: a release before 7.4.0

1. Check installed version

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

2. UPGRADE to 7.4.6 (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 7.4.0 (Debian / Ubuntu)

apt-cache madison forticlientems sudo apt install forticlientems=<VERSION_BEFORE_7.4.0> 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_7.4.0> 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-2026-39810?

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

Is CVE-2026-39810 being exploited?

CVE-2026-39810 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-2026-39810 affect?

CVE-2026-39810 affects forticlientems. Severity is medium (CVSS 6.0). A use of hard-coded cryptographic key vulnerability in Fortinet FortiClientEMS 7.4.0 through 7.4.5 may allow attacker to information disclosure via decrypting database dump.

How urgent is CVE-2026-39810?

Priority 21/100. No elevated risk signals yet.

Software pages

Fortinet vulnerabilities

Related CVEs

CVE-2026-39809 MEDIUM 6.7 UPGRADE A improper neutralization of special elements used in an sql command ('sql injection') vulnerability in Fortin
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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