CVE-2025-52691

SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability

Severity: critical
CVSS v3: 10
EPSS percentile: 100%
Known exploited: yes (CISA KEV)
Vendor: SmarterTools
Product: SmarterMail
Published: 2026-01-26
Modified: 2026-10-07

Description

Successful exploitation of the vulnerability could allow an unauthenticated attacker to upload arbitrary files to any location on the mail server, potentially enabling remote code execution.

NVD record

Informational only. Not a warranty of security, completeness or fitness for any purpose. Derived from NVD, CISA KEV, FIRST.org EPSS and vendor advisories (CVE Program List v5); those sources change continuously and may be incomplete or incorrect. Verify every remediation against the vendor advisory before acting. Absence of a finding is not evidence that no vulnerability exists. Not endorsed by NVD, CISA, FIRST or any vendor named.

Raw record

{
  "id": "CVE-2025-52691",
  "title": "SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability",
  "description": "Successful exploitation of the vulnerability could allow an unauthenticated attacker to upload arbitrary files to any location on the mail server, potentially enabling remote code execution.",
  "severity": "critical",
  "cvss": 10,
  "epss": 100,
  "kev": 1,
  "vendor": "SmarterTools",
  "product": "SmarterMail",
  "published": "2026-01-26",
  "modified": "2026-10-07T12:10:00.170",
  "source": "nvd",
  "remediation": [],
  "disclaimer": "Informational only. Not a warranty of security, completeness or fitness for any purpose. Derived from NVD, CISA KEV, FIRST.org EPSS and vendor advisories (CVE Program List v5); those sources change continuously and may be incomplete or incorrect. Verify every remediation against the vendor advisory before acting. Absence of a finding is not evidence that no vulnerability exists. Not endorsed by NVD, CISA, FIRST or any vendor named."
}