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mail security

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FortiMail CVE-2026-104286: A 9.8 File Write on the Appliance You Never Revisit

October 4, 2026 · 9 min read

FortiMail CVE-2026-104286: A 9.8 File Write on the Appliance You Never Revisit

CISA put FortiMail's unauthenticated 9.8 file write into KEV on 1 October. An exposed, forgotten mail gateway is a weekend job now.

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