CVE-2026-24858Vulnerability
Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability
Exploited in the wildCISA added it to its Known Exploited Vulnerabilities list on .
Reported by 1 independent source · first reported by GreyNoise · last reported
Last reported 6 months ago
CISA KEVAdded 27 Jan 2026
Fix due 30 Jan 2026
Used by ransomware: not knownCISA KEV catalogue
Fix due 30 Jan 2026
Used by ransomware: not knownCISA KEV catalogue
EPSS85.8%
higher than 99% of CVEsFIRST EPSS, as of 20 Oct 2026
higher than 99% of CVEsFIRST EPSS, as of 20 Oct 2026
What the reports say
1 report, newest first · the exact sentence from each-
The Internet Changes Before the Advisory Drops“Fortinet CVE-2026-24858 (CVSS 9.4, zero-day): one day of warning.”
Indicators reported together
named in the same reportsAlso named with it: CVE-2026-20127, CVE-2026-0400
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