CISA KEV catalog
Confirmed active exploitation.
Listed in CISA's catalog of Known Exploited Vulnerabilities: attackers are using it in real attacks. Patch it with priority.
- Name
- Fortinet FortiOS and FortiProxy Improper Authorization
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply updates per vendor instructions.
Description
An Improper Authorization vulnerability in Fortinet FortiOS 6.0.0 to 6.0.4, 5.6.0 to 5.6.8 and 5.4.1 to 5.4.10 and FortiProxy 2.0.0, 1.2.0 to 1.2.8, 1.1.0 to 1.1.6, 1.0.0 to 1.0.7 under SSL VPN web portal allows an unauthenticated attacker to modify the password of an SSL VPN web portal user via specially crafted HTTP requests
Affected products
fortinet: fortiproxy; fortinet: fortios
References5
- fortiguard.com/advisory/FG-IR-18-389 Vendor Advisory
- www.fortiguard.com/psirt/FG-IR-20-231 Vendor Advisory
- fortiguard.com/advisory/FG-IR-18-389 Vendor Advisory
- www.fortiguard.com/psirt/FG-IR-20-231 Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=… US Government Resource
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - EPSS — exploit probability
- 82% percentile: 100 · as of 10 November 2026
- CWE
- CWE-863
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