Home › Exploited CVEs › CVE-2025-52691
CVE-2025-52691: SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability
SmarterTools SmarterMail · in CISA KEV since 2026-01-26
2026-01-26added to KEV
2026-02-16federal remediation due date
85.66%EPSS exploit probability (30 days) 99.7th percentile
10 CRITICALCVSS 3.1
Knownknown ransomware use
28days from NVD publication to KEV
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.
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.
| CWE | CWE-434 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVD published | 2025-12-29 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2025-52691.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.
Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.