CVE-2025-52691

Analyzed
Published: 29 Dec 2025, 02:15
Last modified:26 Feb 2026, 16:07

Vulnerability Summary

Overall Risk (default)
critical
90/100
CVSS Score
10 CRITICAL
v3.1 (cve.org)
EPSS Score
90.15% CRITICAL
90% probability +2.86%
KEV
Listed
CISA
1 listing
Ransomware
Known Use
Public exploits
2 found
Dark Web
Not detected

Timeline

29 Dec 2025, 02:15
Published
Vulnerability first disclosed
26 Jan 2026, 00:00
Added to CISA KEV
SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability
16 Feb 2026, 00:00
CISA Remediation Due
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
26 Feb 2026, 16:07
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•CRITICAL•Score: 10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 90.15%• Percentile: 100%

Techniques & Countermeasures

  • CWE-434•Unrestricted Upload of File with Dangerous Type

    The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.

Affected Systems

  • Unknown•SmarterMail

    < 100.0.9413 | SmarterMail versions Build 9406 and earlier

References (3)