Threatline

State-Sponsored Hackers Exploiting Libraesva Email Security Gateway Vulnerability

Libraesva has released a security update to address a vulnerability in its Email Security Gateway (ESG) solution that it said has been exploited by state-sponsored threat actors. The vulnerability, tracked as CVE-2025-59689, carries a CVSS score of 6.1, indicating medium severity. "Libraesva ESG is affected by a command injection flaw that can be triggered by a malicious email containing a