CVE-2026-7864: Exposure of Sensitive Information to an Unauthorized Actor

Severity: medium (CVSS 6.9 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 16.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-08 · updated 2026-10-26
Weakness: CWE-497

Description

SEPPmail Secure Email Gateway before version 15.0.4 exposes server environment variables through an unauthenticated endpoint in the new GINA UI, allowing remote attackers to obtain sensitive system information.

Affected products

SEPPmail AG Secure Email Gateway: before 15.0.4 — fixed in 15.0.4

How to fix

Upgrade to a fixed version: SEPPmail AG Secure Email Gateway 15.0.4. Check the vendor advisory for mitigations.

References

https://downloads.seppmail.com/extrelnotes/150/ERN15.0.html#security
https://labs.infoguard.ch/posts/seppmail_secure_e-mail_gateway_rce_vulnerabilities_cve-2026-2743_cve-2026-7864_cve-2026-44127_cve-2026-44128/

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