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CISA KEV mandate for FortiMail CVE-2026-104286

Public Sector Action
First reported
Last updated
Happening score
H score 32
2 unique sources, 2 articles

Summary

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CISA added CVE-2026-104286 to the Known Exploited Vulnerability catalog and required federal agencies to perform forensic triage and mitigate the FortiMail flaw by October 4. The action escalates the federal response to an actively exploited zero-day affecting the FortiMail management interface. It puts a concrete remediation deadline on agencies that may have exposed appliances. The catalog listing signals that the vulnerability is already treated as a live operational risk.

Related Happenings

Fortinet FortiMail mitigation guidance for CVE-2026-104286

Advisory/Mitigation
H score49 First: 02.10.2026 01:42 Last: 02.10.2026 01:42 Sources 1

How related: Fortinet has acknowledged that the vulnerability has been exploited in the wild, urging customers to apply the following workarounds until fixes are available for certain versions -

About this happening: Fortinet issued mitigation guidance for CVE-2026-104286 in FortiMail, warning administrators to use workarounds while the flaw is being actively exploited. The adv...

Open Happening

FortiMail actively exploited path traversal and NULL-byte flaw (CVE-2026-104286)

Vulnerability
H score43 First: 02.10.2026 01:42 Last: 02.10.2026 01:42 Sources 1

How related: The vulnerability, tracked as CVE-2026-104286 (CVSS score: 9.8), allows unauthenticated attackers to write arbitrary files on the underlying system.

About this happening: Fortinet FortiMail is facing an actively exploited CVE-2026-104286 flaw that lets unauthenticated attackers write arbitrary files and run unauthorized code on vulnerable d...

Open Happening

CISA KEV remediation deadlines for exploited CVEs

Public Sector Action
H score34 First: 25.09.2026 20:24 Last: 25.09.2026 20:24 Sources 1

About this happening: CISA added CVE-2026-5430 and CVE-2026-71362 to the KEV catalog and set September 27 remediation deadlines for federal agencies using the affected products. Age...

Open Happening

CISA KEV listing of Check Point flaws and three-day federal patch mandate

Public Sector Action
H score36 First: 23.09.2026 09:14 Last: 23.09.2026 09:14 Sources 1

About this happening: CISA added Check Point's exploited zero-day and CVE-2026-85102 to the KEV catalog, triggering a three-day federal patch clock under BOD 26-04. The action f...

Open Happening

CISA adds CVE-2026-68820 to KEV catalog

Public Sector Action
H score3 First: 12.08.2026 09:41 Last: 12.08.2026 09:41 Sources 1

About this happening: CISA added CVE-2026-68820 to the Known Exploited Vulnerabilities (KEV) catalog, requiring federal agencies to apply fixes by August 25, 2026. The action formal...

Open Happening

Timeline

  1. 02.10.2026 01:42 1 articles · 12d ago

    Fortinet warns of actively exploited FortiMail zero-day CVE-2026-104286

    Initial Disclosure

    Fortinet warned customers that CVE-2026-104286 is a critical FortiMail vulnerability being actively exploited in zero-day attacks to execute unauthorized code or commands through the FortiMail management interface. The flaw affects FortiMail 7.2.0 through 7.2.9, 7.4.0 through 7.4.8, 7.6.0 through 7.6.6, and 8.0.0 through 8.0.1, and Fortinet published workarounds, upcoming fixed versions, indicators of compromise, and log entries tied to compromised appliances.

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  2. 02.10.2026 01:42 3 articles · 12d ago

    CISA adds CVE-2026-104286 to the Known Exploited Vulnerability catalog

    Legal Policy Action Update

    CISA added CVE-2026-104286 to the Known Exploited Vulnerability catalog and required federal agencies to perform forensic triage and mitigate the FortiMail flaw by October 4th. The action escalates the response to an actively exploited FortiMail zero-day and places a deadline on affected federal environments.

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