PerimeterClock

Patch-to-exploitation timelines for edge appliances (Fortinet, SonicWall, Ivanti), with detection rules.

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

Vendor: Fortinet
Product: Multiple Products
EPSS: 0.866 (99.7th percentile, 2026-10-30)

Summary

FortiAnalyzer, FortiManager, FortiOS, and FortiProxy contain an authentication bypass vulnerability 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. CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 2026-01-27.

Automated summary, checked against CISA and vendor descriptions; not yet reviewed by an analyst.

Timeline

Date Event Source
2026-01-27 Added to CISA KEV (confirmed exploitation) CISA KEV

References

Affected and fixed versions: see the vendor advisory or NVD entry below.