SmarterTools SmarterMail: SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability
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- started
- Jan 26, 2026
- closed
- Jan 26, 2026
- CVEs
- 2
- sources
- 4
## summary
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. CISA added CVE-2025-52691, CVE-2026-23760 to the Known Exploited Vulnerabilities catalog on 2026-01-26 based on evidence of active exploitation.
severity: Actively exploited (CISA KEV); known ransomware use
## cve ids[2]
## affected
- See vendor advisory / CISA notes (versions not always listed in KEV feed)
## fixed in
- See vendor advisory linked in sources
## timeline[1]
CISA added CVE-2025-52691, CVE-2026-23760 to the KEV catalog (due 2026-02-16).
## advisories[3]
## news & write-ups[1]
## notes & caveats
Derived from CISA KEV JSON feed catalogVersion 2026.10.21. Exact affected/fixed version strings are not always in the KEV record — verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier).
