What EVULNABLE says
Listed in the CISA KEV catalog, and an EPSS probability of 0.857.
Out-of-Band / Urgent Remediation
CVE-2025-52691
SmarterTools — SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability
CISA KEV · in the CISA KEV catalog since 2026-01-26
The priority band answers “how soon”, not “how bad” — see Methodology for what it weighs and where it abstains.
The evidence behind it
| Measure | Value | Source |
|---|---|---|
| CVSS base score | 10.0 | NVD |
| FIRST EPSS | 0.857 (99.71st pctl) | FIRST |
| Actively exploited | Confirmed | CISA KEV |
| Ransomware campaign use | Known | CISA KEV |
| CISA remediation deadline | 2026-02-16 — Overdue by 7 months | CISA KEV |
The primary records
This page is an opinion about urgency. Where it and a source of record disagree, the source of record is the record.
Where this sits
CVE-2025-52691 is one of the entries ranked on the priority feed and in the non-Microsoft advisories.