Warlock Ransomware Breaches SmarterTools Through Unpatched SmarterMail Server
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2025-52691 | Unauthenticated Arbitrary File Upload RCE in SmarterTools SmarterMail | 10.0 | 86% | KEVRansomwarePoC ×2 | KEV |
| CVE-2026-23760 | Unauthenticated Admin Password Reset Bypass in SmarterTools SmarterMail | 9.3 | 96% | KEVRansomwarePoC ×2 | KEV |
| CVE-2026-24423 | Unauthenticated RCE in SmarterTools SmarterMail (CVE-2026-24423) | 9.3 | 88% | KEVRansomwarePoC | KEV |
From the original article
5 min read at thehackernews.com
SmarterTools confirmed last week that the Warlock (aka Storm-2603) ransomware gang breached its network by exploiting an unpatched SmarterMail instance. The incident took place on January 29, 2026, when a mail server that was not updated to the latest version was compromised, the company's Chief Commercial Officer, Derek Curtis, said.
By @TheHackersNews · thehackernews.com
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