CVE-2023-26206: An improper neutralization of input during web page generation ('cross-site scripting') in Fortinet FortiNAC 9

Routine

MEDIUM 6.8UPGRADE

CVE-2023-26206 is a medium-severity flaw (CVSS 6.8) affecting fortinac. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An improper neutralization of input during web page generation ('cross-site scripting') in Fortinet FortiNAC 9.4.0 - 9.4.2, 9.2.0 - 9.2.8, 9.1.0 - 9.1.10 and 7.2.0 allows an attacker to execute unauthorized code or commands via the name fields observed in the policy audit logs.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.8 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-02-15
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

2024-02-15 14:15 UTCPublished CVE record published
2026-06-17 05:42 UTCUpdated Record last modified

fortinet fortinac UPGRADE

Affected: >= 9.1.0 and <= 9.1.10 · >= 9.2.0 and <= 9.2.8 · >= 9.4.0 and <= 9.4.2 · 7.2.0

Fixed in: newer than 9.4.2

Safe to downgrade to: a release before 7.2.0

1. Check installed version

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

2. UPGRADE to newer than 9.4.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fortinac

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 7.2.0 (Debian / Ubuntu)

apt-cache madison fortinac sudo apt install fortinac=<VERSION_BEFORE_7.2.0> sudo apt-mark hold fortinac

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

dnf --showduplicates list fortinac sudo dnf downgrade fortinac-<VERSION_BEFORE_7.2.0> sudo dnf versionlock add fortinac

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-2023-26206?

fortinac: upgrade to newer than 9.4.2. Exact commands for each OS are on this page.

Is CVE-2023-26206 being exploited?

CVE-2023-26206 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-2023-26206 affect?

CVE-2023-26206 affects fortinac. Severity is medium (CVSS 6.8). An improper neutralization of input during web page generation ('cross-site scripting') in Fortinet FortiNAC 9.4.0 - 9.4.2, 9.2.0 - 9.2.8, 9.1.0 - 9.1.10 and 7.2.0 allows an attacker to execute unauthorized code or commands via the name fie

How urgent is CVE-2023-26206?

Priority 34/100. No elevated risk signals yet.

Software pages

Fortinet vulnerabilities

Related CVEs

CVE-2024-31488 MEDIUM 6.8 UPGRADE An improper neutralization of inputs during web page generation vulnerability [CWE-79] in FortiNAC version 9.4
CVE-2023-33300 MEDIUM 5.3 UPGRADE A improper neutralization of special elements used in a command ('command injection') in Fortinet FortiNAC 7.2

References

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