CVE-2025-52691: Upload Arbitrary Files
Critical · CVSS 10.0 (CVSS 3.1)KEV known exploitedEPSS 85.7%, 100th percentilePublished Updated Assigner: CSA
In CISA’s Known Exploited Vulnerabilities catalog: SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability.
Added , federal remediation due . Known 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.
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.
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
SmarterTools: SmarterMail
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- www.csa.gov.sg/alerts-and-advisories/alerts/al-2025-124/ (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)