How severe is CVE-2018-13374?

CVE-2018-13374 has a CVSS score of 4.3/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2018-13374?

Affected package information for CVE-2018-13374 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2018-13374?

No fixed version has been published for CVE-2018-13374 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2018-13374 actively exploited in the wild?

Yes. There are 4 known exploit references for CVE-2018-13374, including 1 documented proof-of-concept exploit on Exploit-DB and 3 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2018-13374?

CVE-2018-13374 has an EPSS (Exploit Prediction Scoring System) score of 3.4%, placing it in the 88th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

Is CVE-2018-13374 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2018-13374 (Fortinet FortiOS and FortiADC Improper Access Control Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2022-09-08. CISA required all US federal civilian agencies to remediate this vulnerability by 2022-09-29. The required action was: Apply updates per vendor instructions. This CVE has been used in known ransomware campaigns. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2018-13374?

CVE-2018-13374 is classified as CWE-732 (CWE-732). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Which products and versions are affected by CVE-2018-13374?

CVE-2018-13374 affects fortinet fortiadc (1 version, e.g. 6.1.0); fortinet fortios. Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2018-13374 published, and has it been updated?

CVE-2018-13374 was published on January 22, 2019 and was last updated on October 24, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2022-09-08 — agencies required to remediate by 2022-09-29 · Ransomware

CVE-2018-13374

MEDIUM

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…

Published

Jan 22, 2019

Updated

Oct 24, 2025

Affected

0 pkgs

Patched

None yet

Exploits

4 known

EPSS Exploitation Probability

via FIRST.org ↗

3.4%probability of exploitation in next 30 days

Lower Risk88th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

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.

Affected Products

2 products · 4 configurations

Application

fortiadcfortinet

≥ 6.0.0 && < 6.0.2

1 version

6.1.0

fortiosfortinet

< 6.0.3

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-46171webappshardware✓ Verified

Fortinet FortiGate FortiOS < 6.0.3 - LDAP Credential Disclosure

by Julio Ureña · Jan 16, 2019

Exploit-DB Source

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2018-13374 in your stack?

O3 detects CVE-2018-13374 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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