Summary
| Parameter | Value |
|---|---|
| CVE ID | CVE-2026-24858 |
| CVE Publication Year | 2026 |
| Date Added to CISA KEV | 2026-01-27 |
| Vendor | Fortinet |
| Product | Multiple Products |
| CVSS Score | 9.8 (critical) |
| CISA KEV Status | Yes - confirmed active exploitation |
| Ransomware | Not confirmed |
| Remediation Deadline | 2026-01-30 |
Vulnerability Description
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.
Required Actions
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Who Is Affected?
This vulnerability affects Multiple Products by Fortinet. Check if your organization uses this software and requires updates.
Sources
Need help securing your systems? nFlo team offers vulnerability management services. Contact us.
Explore Our Products
Solutions mentioned in this article that can help protect your organization:
- FortiAnalyzer — Fortinet
- FortiManager — Fortinet
- FortiProxy — Fortinet
How can nFlo help?
If your organization uses products affected by this vulnerability, contact us. We can help with:
- Verifying whether your systems are at risk
- Implementing patches and risk mitigation
- Monitoring for exploitation attempts in your environment
Useful resources:
- FortiGate — key features
- Incident response management
- SOC — Security Operations Center
- nFlo penetration testing
