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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.
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SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability
01/26/2026
02/16/2026
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
[{"vendor":"SmarterTools","product":"SmarterMail","defaultStatus":"unknown","versions":[{"version":"SmarterMail versions Build 9406 and earlier","status":"affected"}]}]
Modified Analysis by NIST1/27/2026 10:28:07 AM
Action
Type
Old Value
New Value
Added
Reference Type
CISA-ADP: https://github.com/watchtowrlabs/watchTowr-vs-SmarterMail-CVE-2025-52691?ref=labs.watchtowr.com Types: Exploit, Third Party Advisory
Added
Reference Type
CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-52691 Types: US Government Resource
CVE CISA KEV Update by Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government1/26/2026 9:00:02 PM
Action
Type
Old Value
New Value
Added
Date Added
2026-01-26
Added
Due Date
2026-02-16
Added
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.
Added
Vulnerability Name
SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability
OR
*cpe:2.3:a:smartertools:smartermail:*:*:*:*:*:*:*:* versions up to (excluding) 100.0.9413
Added
Reference Type
CSA: https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2025-124/ Types: Third Party Advisory
CVE Modified by CISA-ADP12/29/2025 12:15:45 PM
Action
Type
Old Value
New Value
Added
CWE
CWE-434
New CVE Received from CSA12/28/2025 10:15:42 PM
Action
Type
Old Value
New Value
Added
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.