SEPPMail Secure E-Mail Gateway Vulnerabilities Enable RCE and Mail Traffic Access
May 19, 2026
Vulnerability / Email Security
Critical security vulnerabilities have been disclosed in SEPPMail Secure E-Mail Gateway , an enterprise-grade email security solution, that could be exploited to achieve remote code execution and enable an attacker to read arbitrary mails from the virtual appliance. "These vulnerabilities could have been exploited to read all mail traffic or as an entry vector into the internal network," InfoGuard Labs researchers Dario Weiss, Manuel Feifel, and Olivier Becker said in a Monday report. The list of identified flaws is as follows - CVE-2026-2743 (CVSS score: 10.0) - A path traversal vulnerability in the SeppMail User Web Interface's large file transfer (LFT) feature that could enable arbitrary file write, resulting in remote code execution. CVE-2026-7864 (CVSS score: 6.9) - An exposure of sensitive system information vulnerability that leaks server environment variables through an unauthenticated endpoint in the new GINA UI. CVE-2026-44125 (CVSS score: 9.3) - A mi...
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