by Kastro
Paper/Archive/CVE-2026-44126

CVE-2026-44126

SEPPmail AG Secure Email Gateway — Insecure deserialization

EPSS 0.5%CVSS 9.2
critical.is priorityof 100
36
CVSS 9.2 (CNA)9.2 / 10 × 3027.6Not in CISA KEV+300.0EPSS percentile 40.9.409 × 208.2No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

SEPPmail Secure Email Gateway before version 15.0.4 insecurely deserializes untrusted data, which can be reached from the new GINA UI and may allow unauthenticated remote attackers to execute code via a crafted serialized object.

Affected

ProductAffectedFixed inSource
Secure Email Gateway< 15.0.415.0.4CNA

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
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refdownloads.seppmail.com/extrelnotes/150/ERN15.0.html#securityreflabs.infoguard.ch/posts/seppmail_secure_e-mail_gateway_rce_vulnerabilities_cve-2026-2743_cve-2026-7864_cve-2026-44127_cve-2026-44128