ACTIVELY EXPLOITED3 sources verified·1 min read
By Lyrie Threat Intelligence·1/26/2026
CVE-2025-52691 added to CISA KEV: SmarterTools SmarterMail
Status: ✅ Confirmed exploited in the wild
Date added: 2026-01-26
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Due date: 2026-02-16
Why this matters
SmarterTools SmarterMail contains an unrestricted upload of file with dangerous type vulnerability that could allow an unauthenticated attacker to upload arbitrary files to any location on the mail server, potentially enabling remote code execution.
Sources
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