Background exploitation KEV catalog Ransomware

CVE-2018-13374

Fortinet FortiOS and FortiADC Improper Access Control Vulnerability

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…

CheckOps priority index

5.3/10 Patch within 7 days

Severity4.3

Probability3.8

Exploitation4/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 38.1% higher than 98.6% of CVEs

CVSS 3.1 4.3 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:

Exploited for 1,517 days 08 Sept 2022

CISA due date 29 Sept 2022 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 4 / 5

KEV catalog (CISA)08 Sept 2022
Exploited in EUVD (ENISA)08 Sept 2022
Used by ransomwareyes
EPSS above 10 %38.1%
No account, over the networkno

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: Apply updates per vendor instructions.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Description ENISA EUVD

Affected products

Fortinet FortiOS, fortiADCFortiOS and FortiADC

Affected versions

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

Weaknesses (CWE)

CWE-732

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

22 Jan 2019
Published
08 Sept 2022
Exploitation reported (ENISA)
08 Sept 2022
Added to the KEV catalog
29 Sept 2022
CISA remediation due date
07 Oct 2026
EPSS peak: 38.1%

References

Other exploited vulnerabilities from the same vendor

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CVE-2026-104286Fortinet FortiMail Path Traversal Vulnerability
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CVE-2025-25249Fortinet Multiple Products Heap-based Buffer Overflow Vulnerability
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CVE-2025-68686Fortinet FortiOS Exposure of Sensitive Information to an Unauthorized Actor Vulnerability
5.4 · Actively exploited
CVE-2026-39808Fortinet FortiSandbox OS Command Injection Vulnerability
8.8 · Actively exploited
CVE-2026-25089Fortinet FortiSandbox OS Command Injection Vulnerability
8.3 · Actively exploited