# CVE-2026-24858: Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability

> CVE-2026-24858: Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability. CVSS 9.4 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2026-24858
Last updated: 2026-06-17T10:23:43Z

- Published: 2026-01-27 19:18 UTC · Updated: 2026-06-17 10:23 UTC · Assigner: fortinet
- CVSS: 9.4 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C
- EPSS: 86.6%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2026-01-27, federal due date 2026-01-30, ransomware use: Unknown
- CWE: CWE-288

## Description

An Authentication Bypass Using an Alternate Path or Channel vulnerability \[CWE-288\] vulnerability in Fortinet FortiAnalyzer 7.6.0 through 7.6.5, FortiAnalyzer 7.4.0 through 7.4.9, FortiAnalyzer 7.2.0 through 7.2.11, FortiAnalyzer 7.0.0 through 7.0.15, FortiManager 7.6.0 through 7.6.5, FortiManager 7.4.0 through 7.4.9, FortiManager 7.2.0 through 7.2.11, FortiManager 7.0.0 through 7.0.15, FortiNAC-F 7.6.3 through 7.6.5, FortiOS 7.6.0 through 7.6.5, FortiOS 7.4.0 through 7.4.10, FortiOS 7.2.0 through 7.2.12, FortiOS 7.0.0 through 7.0.18, FortiProxy 7.6.0 through 7.6.4, FortiProxy 7.4.0 through 7.4.12, FortiProxy 7.2.0 through 7.2.15, FortiProxy 7.0.0 through 7.0.22, FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11 may 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.

## CISA required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

## Affected vendors and products

- Fortinet: FortiAnalyzer
- Fortinet: FortiManager
- Fortinet: FortiNAC-F
- Fortinet: FortiOS
- Fortinet: FortiProxy
- Fortinet: FortiWeb
- Siemens: RUGGEDCOM APE1808

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-24858)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-24858)
- [https://fortiguard.fortinet.com/psirt/FG-IR-26-060](https://fortiguard.fortinet.com/psirt/FG-IR-26-060)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-24858 · Markdown: https://rewindex.com/cve/CVE-2026-24858.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-24858 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:10:46.233Z