CVE-2026-24858 Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel
Attackers with FortiCloud accounts can bypass authentication to access other users' devices if FortiCloud SSO is enabled.
- Exploited in the wild
- Since 27 Jan 2026
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-24858?
CVE-2026-24858 is a critical authentication bypass vulnerability in Fortinet Fortianalyzer, published on 27 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-288
Which versions are affected by CVE-2026-24858?
It affects 7 products.
Products include Fortinet Fortianalyzer, Fortinet Fortimanager, Fortinet Fortinac-F, Fortinet Fortios, Fortinet Fortiproxy, Fortinet Fortiweb and 1 more.
How do I fix CVE-2026-24858?
No fix has been published for CVE-2026-24858 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 30 Jan 2026.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-24858 being exploited?
Yes. Attackers have exploited CVE-2026-24858 in the wild since at least 27 Jan 2026.
Public exploit code: 5 proofs of concept on GitHub.
Other vulnerabilities in Fortinet Fortianalyzer
- CVE-2023-25610 Memory corruption in FortiAnalyzer
- CVE-2021-32603 Server-side request forgery in Fortinet FortiAnalyzer, FortiManager
- CVE-2020-12817 Cross-site scripting in Fortinet FortiAnalyzer
- CVE-2024-48886 Auth bypass in FortiOS
- CVE-2022-39950 Cross-site scripting in Fortinet FortiAnalyzer, FortiManager
Sources
Also known as GHSA-2x38-48vp-w23x.