CVE-2026-84832

Unsafe deserialization in the REST interface

State: Published
Severity: 8.6 High
Published: Sep 3, 2026
Updated: Oct 8, 2026
Reserved: Sep 2, 2026

Description

SEPPmail Secure Email Gateway before 15.0.6 deserializes attacker-controlled data in a privileged REST import workflow without adequate validation. An attacker with a privileged API token can execute arbitrary commands with "nobody" privileges.

Scores

CVSS	Score	Vector	Source
4.0	8.6 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	NCSC.ch

Weaknesses

CWE-502 Deserialization of untrusted data
CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection')

Affected Products

Product	Versions
SEPPmail Secure Email Gateway (SEG)SEPPmail AG	before 15.0.6Affected

References

https://downloads.seppmail.com/extrelnotes/150/ERN15.0.html

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