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Indicators are what attackers leave behind. Stolen credentials are what they arrive with.

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3 IOCs

CVE-2026-104286: Critical FortiMail Zero-Day Exploited for Unauthenticated File Writes

SOC Prime
SOC Prime
Published October 5, 2026Original Report

Excerpt

Fortinet has disclosed a critical FortiMail zero-day vulnerability that attackers are already exploiting in the wild. Tracked as CVE-2026-104286 and rated 9.8 on the CVSS scale, the flaw enables an unauthenticated remote attacker to write arbitrary files to the underlying system by sending specially crafted HTTP or HTTPS requests. The vulnerability poses a significant risk because FortiMail appliances are often positioned at the enterprise perimeter to protect email…

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Diamond Model

SOCIAL AXISTECHNOLOGY AXISADVERSARYunknownINFRASTRUCTURE79.141.169.187CAPABILITYunknownVICTIMunknown
Adversary
Infrastructure(1)
Capability
Victim

Indicators of Compromise

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3 indicators

TypeIndicatorConfidenceScoreFirst Seen
IP79.141.169.187HighScore 68/100First seen
CVECVE-2026-88779HighScore 79/100First seen
CVECVE-2026-104286HighScore 66/100First seen

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