CVE-2026-8811 PUBLISHED

Path traversal in PDF generation module

Assigner: NCSC.ch
Reserved: 18.05.2026 Published: 18.06.2026 Updated: 18.06.2026

SEPPmail versions before 15.0.5 allow improper handling of attachment filenames during encrypted PDF generation. An attacker can exploit this to create new files outside the intended directory, potentially placing files in web-accessible locations.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L
CVSS Score: 7.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	Present	Availability	Low	Availability	Low
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	SEPPmail AG
Product	Secure Email Gateway
Versions	Default: unaffected affected from 0 to 15.0.5 (excl.)

Credits

Andris Suter-Dörig (ETH Zürich, Applied Crypto Group) finder
Olivier Becker (InfoGuard AG) finder

References

https://downloads.seppmail.com/extrelnotes/150/ERN15.0.html#possible-path-traversal-vulnerability

Problem Types

CWE-22 CWE

Impacts

CAPEC-126 Path Traversal