GCVE-110-OSM-2026-832

Advisory PublishedCVSS 9.6/10

Vulnetix · Advisory published March 27, 2026

Malicious email SMTP library targeting email integration developers with automated RAT delivery. Uses IL weaving to inject module initializers into compiled .NET binaries for automatic execution on load. Downloads batch scripts from C2 at nazi.igboat.com and executes SeroXen RAT payloads.

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Weaknesses (CWE)

CWE-506Embedded Malicious Code

Risk Scores

CVSS 3.1

9.6/10

Critical · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Affected Products

Vendor	Product	Versions	Platforms
unknown	Fluentmail.Smtp	all (affected)	—

References

Malicious nuget package: Fluentmail.Smtp

advisory

vendor

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