CVE-2026-21743

HIGH
2026-02-10 [email protected]
7.2
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 22:02 vuln.today
CVE Published
Feb 10, 2026 - 16:16 nvd
HIGH 7.2

Tags

Fortinet Fortiauthenticator

Description

A missing authorization vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.6, FortiAuthenticator 6.5 all versions, FortiAuthenticator 6.4 all versions, FortiAuthenticator 6.3 all versions may allow a read-only user to make modification to local users via a file upload to an unprotected endpoint.

Analysis

FortiAuthenticator 6.3 through 6.6.6 allows read-only users to modify local user accounts by uploading files to an unprotected endpoint, bypassing authorization controls. This vulnerability requires high privileges to initiate but could enable unauthorized account modifications in affected deployments. …

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Remediation

Within 24 hours: Identify all FortiAuthenticator instances in your environment and document their versions and deployment scope. Within 7 days: Implement network segmentation to restrict access to the vulnerable file upload endpoint to trusted administrative networks only, and audit recent file uploads for unauthorized modifications. …

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Priority Score

36
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +36
POC: 0

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CVE-2026-21743 vulnerability details – vuln.today
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