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vulnerability · Sat 03 Oct 2026 · 11:33 UTC

Actively exploited

Critical FortiMail zero-day exploited in the wild (CVE-2026-104286) Fortinet is warning customers that attackers are exploiting a zero-day vulnerability (CVE-2026-104286)

Filed UTCSource HNS ↗

Critical FortiMail zero-day exploited in the wild (CVE-2026-104286) Fortinet is warning customers that attackers are exploiting a zero-day vulnerability (CVE-2026-104286) in FortiMail, its email security gateway. …

Signals

as the pipeline stamped them
KEV
Active exploitation (KEV)
What to do
  1. On CISA KEV — actively exploited. Patch immediately.

CISA KEV means this flaw has been seen exploited in real attacks — not predicted, observed. Treat it as urgent regardless of its score.

CVE

KEV from CISA · EPSS from FIRST
CVE ids in this dispatch with their KEV status and EPSS score
IdKEVEPSSReference
CVE-2026-104286KEV2%NVD ↗

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