Secuno
ENNL
Book demo

CVE-2018-13374

Fortinet FortiOS and FortiADC Improper Access Control

4.3 MEDIUMActively exploited (CISA KEV)Used in ransomwareEPSS 38.1%
  1. Published22 Jan 2019
  2. Added to CISA KEV8 Sept 2022
  3. Remediation due29 Sept 2022
Actively exploited (CISA KEV)

Fortinet FortiOS and FortiADC contain an improper access control vulnerability that allows attackers to obtain the LDAP server login credentials configured in FortiGate by pointing a LDAP server connectivity test request to a rogue LDAP server.

Added to KEV: 8 Sept 2022Federal remediation due: 29 Sept 2022Used in ransomware

Description

A Improper Access Control in Fortinet FortiOS 6.0.2, 5.6.7 and before, FortiADC 6.1.0, 6.0.0 to 6.0.1, 5.4.0 to 5.4.4 allows attacker to obtain the LDAP server login credentials configured in FortiGate via pointing a LDAP server connectivity test request to a rogue LDAP server instead of the configured one.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected products

Fortinet Fortiadc≥ 5.4.0 < 5.4.5 · ≥ 6.0.0 < 6.0.2 · 6.1.0
Fortinet FortiOS< 6.0.3

Remediation

Fixed in
Fortinet Fortiadc≥ 5.4.5
Fortinet FortiOS≥ 6.0.3

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-1078148.4
MariaDB server is a community developed fork of MySQL server. From 10.6.1 until…
CVE-2026-1052678.1
The Gitea web route for deleting tags (`POST /{owner}/{repo}/tags/delete`) requires…
CVE-2026-863618.2
Dell System Update, versions prior to 2.3.0.0, contains an Incorrect Permission…
CVE-2026-393539.1
InvoicePlane is a self-hosted open source application for managing invoices, clients,…
CVE-2026-918008.8
A local privilege escalation vulnerability exists in the installer of Foxit PDF Editor…
CVE-2026-917988.8
A local privilege escalation vulnerability exists in the update daemon of Foxit PDF…

Frequently asked

Is CVE-2018-13374 being actively exploited?

Yes. CVE-2018-13374 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 8 Sept 2022. It has been used in ransomware campaigns.

How severe is CVE-2018-13374?

CVE-2018-13374 has a CVSS 3.1 base score of 4.3, rated medium. EPSS estimates a 38.1% probability of exploitation.

Which products are affected by CVE-2018-13374?

Affected products include Fortinet Fortiadc, Fortinet FortiOS.

How do I fix CVE-2018-13374?

Upgrade affected software to a fixed version, for example Fortinet Fortiadc 5.4.5, Fortinet FortiOS 6.0.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2018-13374 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.