CVE-2025-52691 CRITICAL

CVE-2025-52691: Upload Arbitrary Files

Vendor Smartertools
Product SmarterMail
KEV Status Known Exploited
Ransomware Used in campaigns
Published December 29, 2025
Last update February 26, 2026
View on NVD All CVEs

CVSS base score

10.0/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

What the vulnerability does

01Description

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.

CISA mandated remediation

02CISA 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.

Key dates

03Disclosure timeline

December 29, 2025 CVE published
February 26, 2026 Record updated