Exploited CVEs / Fortinet / CVE-2018-13374
CVE-2018-13374
Fortinet FortiOS and FortiADC Improper Access Control Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted, and the vulnerability is known to be used in ransomware campaigns. Federal agencies were required to remediate by 2022-09-29 (that deadline has passed); treat that date as the outer bound for your own environment. The fix is in the vendor advisory: Fortinet PSIRT Advisories, linked below.
Actively exploited Fortinet FortiOS and FortiADC vulnerability, Medium severity, CVSS 4.3. Added to the CISA KEV catalog 2022-09-08.
Risk summary
Updated July 26, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2018-13374
A Medium Severity CVSS 4.3 score hides real-world teeth here: Fortinet FortiOS and FortiADC will send their configured LDAP credentials to a rogue server during a connectivity test, letting an attacker walk away with the domain service account the firewall binds with. That stolen account is a beachhead into Active Directory, which is why this flaw shows up in ransomware intrusions and sits on the KEV list with a 38 percent EPSS score.
Do this: Patch affected FortiOS and FortiADC devices and reset the LDAP bind account they use, granting it least privilege.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2018-13374
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2018-13374
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
CISA required action
Federal (BOD 22-01) remediation due date: 2022-09-29 (past due).
Apply updates per vendor instructions.
Official fix for CVE-2018-13374
The authoritative fix and affected-version list are published by the vendor. Find the FortiOS and FortiADC advisory on Fortinet PSIRT Advisories.
Common questions about CVE-2018-13374
Is CVE-2018-13374 actively exploited?
Yes. CVE-2018-13374 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2022-09-08, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 38%. CISA also reports it is known to be used in ransomware campaigns.
What is the CISA deadline and required action for CVE-2018-13374?
CISA set the federal (BOD 22-01) remediation due date at 2022-09-29, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply updates per vendor instructions.
What fixes CVE-2018-13374?
The authoritative fix is in the vendor advisory: see Fortinet PSIRT Advisories for the patched FortiOS and FortiADC versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2018-13374?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2018-13374's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).
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Authoritative references
Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.
