CISA Known Exploited Vulnerability
This vulnerability is actively exploited in the wild and listed in the CISA Known Exploited Vulnerabilities catalog.
Remediation Deadline: Jan 30, 2026
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.
EPSS — Exploit Probability
Higher than 85.9% of all CVEs
Required Action
Please adhere to Fortinet's guidelines to assess exposure and mitigate risks. Check for signs of potential compromise on all internet accessible Fortinet products affected by this vulnerability. Apply any final mitigations provided by the vendor as soon as they become available. For more information please see: https://fortiguard.fortinet.com/psirt/FG-IR-26-060 ; https://www.fortinet.com/blog/psirt-blogs/analysis-of-sso-abuse-on-fortios ; https://nvd.nist.gov/vuln/detail/CVE-2026-24858
Related Articles (2)
FortiGate Devices Exploited to Breach Networks and Steal Service Account Credentials
Attackers exploit FortiGate vulnerabilities to steal LDAP credentials and breach networks, enabling AD access and malware deployment.
Mar 10, 2026
Siemens RUGGEDCOM APE1808 Devices
View CSAF
Mar 12, 2026
Risk Assessment
ELEVATEDDetails
- Severity
- High
- EPSS
- 2.8%
- CISA KEV
- Yes
- Ransomware
- Unknown
- Articles
- 2
Timeline
Published
Jan 27, 2026
Added to KEV
Jan 27, 2026
Remediation Due
Jan 30, 2026