CVE-2025-52691 — SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability
2026-01-26 • CISA Known Exploited Vulnerability
[event] 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.
> AFFECTED SOFTWARE
| Field | Value |
|---|---|
| Vendor | SmarterTools |
| Product | SmarterMail |
| CWE | CWE-434 |
| CVE ID | CVE-2025-52691 |
| Date Added | 2026-01-26 |
| Due Date | 2026-02-16 |
| Ransomware Campaign | Known — this vulnerability has been leveraged in ransomware campaigns |
> MITIGATION
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