by Kastro
Paper/Archive/CVE-2026-114425

CVE-2026-114425

SEPPmail AG SEPPmail Secure Email Gateway (SEG) — Forged LFT metadata permits arbitrary file read and deletion

CVSS 9.2
critical.is priorityof 100
28
CVSS 9.2 (CNA)9.2 / 10 × 3027.6Not in CISA KEV+300.0No EPSS score.000 × 200.0No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

SEPPmail Secure Email Gateway before 15.1.1 trusts a file path supplied in externally provided Large File Transfer attachment metadata. An unauthenticated remote sender can cause the mail-processing worker to disclose, move, or delete an accessible regular file when LFT is enabled and the message reaches an affected secure-mail processing path. The validated workers ran as root.

Affected

ProductAffectedFixed inSource
SEPPmail Secure Email Gateway (SEG)< 15.1.115.1.1CNA

Scores by source

NCSC.ch (CNA)9.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References

refdocs.seppmail.com/en/20_revision-history.html