Active Exploitation of SmarterMail Vulnerability WT-2026-0001 Post-Patch

Active Exploitation of SmarterMail Vulnerability WT-2026-0001 Post-Patch

First seen 22 Jan 2026, 21:42 UTC CybersecuritynewsSecurityaffairs.CoHuntressGbhackersFilestore.Fortinet 65.8

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ThreatCluster

A vulnerability in SmarterTools SmarterMail, tracked as WT-2026-0001, is being actively exploited just two days after a patch was released on January 15, 2026. As of now, no CVE has been assigned to this flaw, raising concerns among users of the software.

Timeline

2026-01-15
Patch released for SmarterMail vulnerability WT-2026-0001
2026-01-17
Vulnerability under active attack