CVEvulnerability

CVE-2025-52691

10.0 CRITICAL Known exploited Published 2025-12-29 Modified 2026-10-07 Official page ↗

CISA Known Exploited Vulnerability

SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability — SmarterTools SmarterMail

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.

Added to KEV
2026-01-26
Remediation due
2026-02-16
Ransomware use
Known
Required action
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
Status
Analyzed
Published
2025-12-29
Last modified
2026-10-07
Assigner
5f57b9bf-260d-4433-bf07-b6a79e9bb7d4
CVSS 3.1 (5f57b9bf-260d-4433-bf07-b6a79e9bb7d4)
10.0 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weaknesses
CWE-434

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.

Affected configurations

• smartertools smartermail (< 100.0.9413)

Related

Weakness · CWE (1)

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

References