CVE-2025-52691 — SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability
CVE-2025-52691: SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | SmarterTools |
| Product | SmarterMail |
| Date added | 2026-01-26 |
| Due date | 2026-02-16 |
| Ransomware campaign use | Known |
Description
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.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
https://www.smartertools.com/smartermail/release-notes/current ; https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2025-124/ ; https://nvd.nist.gov/vuln/detail/CVE-2025-52691
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-52691
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog