CVE-2026-24858
Last modified
CVE-2026-24858 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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 has confirmed active exploitation in the wild. EPSS estimates a 85.84% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Fortinet | Fortianalyzer | >= 7.0.0, <= 7.0.15 |
| Fortinet | Fortianalyzer | >= 7.2.0, <= 7.2.11 |
| Fortinet | Fortianalyzer | >= 7.4.0, < 7.4.10 |
| Fortinet | Fortianalyzer | >= 7.6.0, < 7.6.6 |
| Fortinet | Fortimanager | >= 7.0.0, <= 7.0.15 |
| Fortinet | Fortimanager | >= 7.2.0, <= 7.2.11 |
| Fortinet | Fortimanager | >= 7.4.0, < 7.4.10 |
| Fortinet | Fortimanager | >= 7.6.0, < 7.6.6 |
| Fortinet | Fortinac-F | >= 7.6.3, < 7.6.6 |
| Fortinet | Fortiproxy | >= 7.0.0, <= 7.0.22 |
| Fortinet | Fortiproxy | >= 7.2.0, <= 7.2.15 |
| Fortinet | Fortiproxy | >= 7.4.0, <= 7.4.12 |
| Fortinet | Fortiproxy | >= 7.6.0, <= 7.6.4 |
| Fortinet | Fortiweb | >= 7.4.0, <= 7.4.11 |
| Fortinet | Fortiweb | >= 7.6.0, <= 7.6.6 |
| Fortinet | Fortiweb | >= 8.0.0, <= 8.0.3 |
| Fortinet | Fortios | >= 7.0.0, <= 7.0.18 |
| Fortinet | Fortios | >= 7.2.0, <= 7.2.12 |
| Fortinet | Fortios | >= 7.4.0, < 7.4.11 |
| Fortinet | Fortios | >= 7.6.0, < 7.6.6 |
| Siemens | Ruggedcom Ape1808 Firmware | All versions |
References
- https://fortiguard.fortinet.com/psirt/FG-IR-26-060Vendor Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-975644.htmlThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-24858US Government Resource
- https://www.fortinet.com/blog/psirt-blogs/analysis-of-sso-abuse-on-fortiosMitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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