SmarterTools known exploited vulnerabilities
CISA's Known Exploited Vulnerabilities catalog lists 3 SmarterTools vulnerabilities: 3 added in the last 365 days, 3 rated critical (CVSS 9 or higher), and 3 with known ransomware use. The most recent was added Feb 5, 2026.
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| Added to KEV | CVE | Vulnerability | CVSS | EPSS | Federal due date | Ransomware use |
|---|---|---|---|---|---|---|
| 2026-02-05 | CVE-2026-24423 | SmarterTools SmarterMail Missing Authentication for Critical Function Vulnerability | 9.3 (v4.0) | 88.2% | 2026-02-26 | Known |
| 2026-01-26 | CVE-2025-52691 | SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability | 10 (v3.1) | 85.7% | 2026-02-16 | Known |
| 2026-01-26 | CVE-2026-23760 | SmarterTools SmarterMail Authentication Bypass Using an Alternate Path or Channel Vulnerability | 9.3 (v4.0) | 96.4% | 2026-02-16 | Known |