CVE-2026-24858 — Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability
2026-01-27 • CISA Known Exploited Vulnerability
[event] Fortinet FortiAnalyzer, FortiManager, FortiOS, and FortiProxy contain an authentication bypass using an alternate path or channel that could allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices.
> AFFECTED SOFTWARE
| Field | Value |
|---|---|
| Vendor | Fortinet |
| Product | Multiple Products |
| CWE | CWE-288 |
| CVE ID | CVE-2026-24858 |
| Date Added | 2026-01-27 |
| Due Date | 2026-01-30 |
| Ransomware Campaign | Unknown |
> MITIGATION
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Due Date: 2026-01-30