CVE

CVE-2025-52691

P1⬤ KNOWN RANSOMWARE USE

SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability

SmarterTools · SmarterMail

Date added (CISA)

2026-01-26

Remediation due

2026-02-16

Known ransomware use

Yes

Remediation priority

P1 — known ransomware use · past CISA due date

ATT&CK mapping

No ATT&CK mapping yet

The CTID Mappings Explorer hasn't published an exploitation/impact technique mapping for this CVE yet.