CVE detail
CVE-2025-52691: SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability
Source: CISA Known Exploited Vulnerabilities catalog · back to feed
Vendor / product
SmarterTools · SmarterMail
- Date added (KEV)
- Jan 26, 2026
- CISA due date
- Feb 16, 2026
- Ransomware campaign 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.
Scorifya interpretation
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Plain English
Technical detail
From CISA
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.
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
See what attackers can see on your domain
This vulnerability is on CISA's Known Exploited Vulnerabilities list, so it is being exploited in the wild right now, including in ransomware campaigns. Scorifya can't test for SmarterTools directly, but in about 30 seconds it shows what your own domain exposes publicly across TLS, security headers, DNS, and cookies: the surface attackers probe first.
SOC 2 compliance
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See Scorifya Controls →References
- https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2025-124/Third Party Advisory
- https://github.com/watchtowrlabs/watchTowr-vs-SmarterMail-CVE-2025-52691?ref=labs.watchtowr.comExploitThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-52691US Government Resource
Other recent CVEs from SmarterTools
- CVE-2026-24423SmarterMail, SmarterTools SmarterMail Missing Authentication for Critical Function Vulnerability
- CVE-2026-23760SmarterMail, SmarterTools SmarterMail Authentication Bypass Using an Alternate Path or Channel Vulnerability