Exploited vulnerability · CISA KEV

Is CVE-2018-13382 exploited? Yes: in CISA KEV since 10 Jan 2022

Gociux · Fortinet FortiOS and FortiProxy · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2018-13382, Fortinet FortiOS and FortiProxy Improper Authorization, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 10 Jan 2022, 951 days after it was published. It is known to be used in ransomware campaigns. It affects Fortinet FortiOS and FortiProxy, an internet-facing product of the kind attackers use for initial access. If you run it, CISA's required action is: Apply updates per vendor instructions.

What it is

An Improper Authorization vulnerability in Fortinet FortiOS and FortiProxy under SSL VPN web portal allows an unauthenticated attacker to modify the password.

What to do

1. Check whether you run it. Look for FortiOS and FortiProxy in your asset inventory, including appliances and cloud images. Stack check lists every exploited Fortinet CVE at once.
2. Apply the fix. Apply updates per vendor instructions.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 4 Jun 2019.
4. Get told next time. Email alerts when CISA adds a CVE for Fortinet.

Other exploited CVEs in FortiOS and FortiProxy

• CVE-2025-24472: Fortinet FortiOS and FortiProxy Authentication Bypass Vulnerability (18 Mar 2025)
• CVE-2024-55591: Fortinet FortiOS and FortiProxy Authentication Bypass Vulnerability (14 Jan 2025)
• CVE-2018-13383: Fortinet FortiOS and FortiProxy Out-of-bounds Write (10 Jan 2022)

References

• nvd.nist.gov/vuln/detail/CVE-2018-13382

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in January 2022 · Fortinet scorecard · act-now radar.