Fortinet FortiOS and FortiProxy Improper Authorization
- Severity
- High7.5CVSS 3.1, High
- EPSS
- 82%
- Published
- 4 Jun 2019
- Updated
- 17 Jun 2026
Description
Title, description and vendor guidance are quoted from the source records.
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
Weakness: CWE-863
Known exploited
Added to CISA KEV on 10 Jan 2022
Federal remediation due date: 10 Jul 2022
Known use in ransomware campaigns
Required action: Apply updates per vendor instructions.
Exploit prediction
82% probability of exploitation in the next 30 days (percentile 100%).
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected products
Patcharo shows this vulnerability for information but does not match versions for this product yet.
- Fortinet Fortinet FortiOS, FortiProxy · FortiOS 6.0.0 to 6.0.4, 5.6.0 to 5.6.8, 5.4.1 to 5.4.10, 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
References
Provenance
Every fact on this page comes from the sources below. Nothing is written by an AI.
- Fortinet (CVE record)
- Fortinet (CVE record) · 27 Sept 2026, 23:46 UTC · Parser patcharo-cve5/1.1.0
- CISA Known Exploited Vulnerabilities
- CISA Known Exploited Vulnerabilities · 27 Sept 2026, 23:42 UTC · Parser patcharo-kev/1.0.0
- NVD
- NVD · 27 Sept 2026, 23:44 UTC · Parser patcharo-nvd/1.0.0
- FIRST EPSS
- FIRST EPSS · 27 Sept 2026, 23:46 UTC · Parser patcharo-epss/1.0.0
Last verified: 28 Sept 2026, 02:31 UTC