CVE-2025-52691

Upload Arbitrary Files

State: Published
Severity: 10.0 Critical
Published: Dec 29, 2025
Updated: Feb 26, 2026
Reserved: Jun 19, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	10.0 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H	CSA

Weaknesses

CWE-434 Unrestricted Upload of File with Dangerous Type

Affected Products

Product	Versions
SmarterMailSmarterTools	SmarterMail versions Build 9406 and earlierAffected

References

https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2025-124/
https://github.com/watchtowrlabs/watchTowr-vs-SmarterMail-CVE-2025-52691?ref=labs.watchtowr.comexploit
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-52691government-resource

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