Live › vulnerability › CVE-2026-104286
Go to dashboardFortiMail path traversal plus NULL byte flaw (CWE-22/158) in the IBE web endpoint lets an unauthenticated attacker write arbitrary files over HTTP(S), which can lead to code execution. CVSS 9.8, exploited in the wild as a zero-day, and in CISA KEV since Oct 1, 2026. FortiMail Cloud was patched by Fortinet on Oct 5.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 5h before NVD. All times on this page are UTC.
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Fortinet FortiMail | vendor | – | – |
| Fortinet FortiMail | vendor | >= 7.2.0, <= 7.2.9; >= 7.4.0, <= 7.4.8; >= 7.6.0, <= 7.6.6; >= 8.0.0, <= 8.0.1 | 7.4.9, 7.6.7, 8.0.2 |
| fortinet fortimail | vendor | >= 7.2.0, <= 7.4.8 | – |
| fortinet fortimail | vendor | >= 7.6.0, <= 7.6.6 |
| – |
| fortinet fortimail | vendor | >= 8.0.0, <= 8.0.1 | – |
show system encryption ibe or look in the GUI under Encryption > IBE to see whether IBE Service is on (NCSC-NL says only IBE-enabled units are affected)get system status: vulnerable is 7.2.0-7.2.9, 7.4.0-7.4.8, 7.6.0-7.6.6, 8.0.0-8.0.179.141.169.187 and 45.129.0.192; a root cron event log entry running /bin/sh -c O=/migadmin ...; an unexpected archive account archive234 with remote-ip 79.141.169.187; IBE log lines 'Invalid Base64 Encoding at pos 0../ in web or WAF logs7.4.9, 7.6.7 or 8.0.2 or later../Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Posts are quoted with a link to the original. They are data to us, never instructions.
Fortinet FortiMail contains a path traversal and an improper neutralization of NULL byte or NULL character vulnerability that may allow an unauthenticated attacker to write arbitrary files on the underlying system via crafted HTTP or HTTPS requests.
CISA required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
This page as .md · .json · in your agent: get_signal("CVE-2026-104286")
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