CVE advisoryCRITICAL
CVE-2026-2743
SeppMail allows attackers to take control of your systems by uploading malicious files.
Halo Surface Signal: 5 out of 5 — more likely to be public-facing.
SeppMail's large file transfer feature has a critical flaw allowing attackers to take over your system by uploading malicious files. This internet-facing vulnerability could grant them full control.