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SmarterMail Authentication Bypass Vulnerability Actively Exploited

SmarterMail Authentication Bypass Vulnerability Actively Exploited

First seen 24 Jan 2026, 02:39 UTC • •

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ThreatCluster AI
ThreatCluster •March 12, 2026 at 13:27 UTC

A critical authentication bypass vulnerability in SmarterTools' SmarterMail, identified as WT-2026-0001, is being actively exploited. The flaw allows unauthenticated attackers to reset admin passwords and gain full privileges. SmarterTools released a patch on January 15, 2026, but attackers continue to target unpatched systems.

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