SmarterTools SmarterMail

What it is

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.

What to do

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Vendor notices and references

• www.smartertools.com/smartermail/release-notes/current
• www.csa.gov.sg/alerts-and-advisories/alerts/al-2025-124/
• nvd.nist.gov/vuln/detail/CVE-2025-52691

Description and required action as published by CISA. Full record at NVD.