EUVD-2026-28590
GHSA-987g-rmgr-mpfx
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4DescriptionCVE.org
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.
AnalysisAI
SEPPmail Secure Email Gateway before version 15.0.4 exposes server environment variables through an unauthenticated endpoint in the GINA UI, allowing remote attackers to retrieve sensitive system information including configuration details, internal paths, and potentially credentials. The vulnerability requires only network access to the affected endpoint with no authentication, authentication complexity, or user interaction; it is classified as an information disclosure flaw with limited confidentiality impact (CVSS 6.9).
Technical ContextAI
The vulnerability exists in the new GINA (graphical interface) UI component of SEPPmail Secure Email Gateway. The affected endpoint fails to implement proper access controls on an interface that exposes server environment variables-data structures containing system configuration, runtime settings, and potentially sensitive values. This is a classic CWE-497 (Exposure of Sensitive System Information to an Unauthorized Control Sphere) vulnerability, where internal system state intended for server administration is inadvertently accessible to unauthenticated remote clients. Environment variables often contain database connection strings, API keys, service credentials, internal IP addresses, and runtime configuration flags. The GINA UI's new functionality apparently introduced this exposure without proper authentication or authorization checks.
RemediationAI
Vendors and users must upgrade SEPPmail Secure Email Gateway to version 15.0.4 or later, which addresses the unauthenticated endpoint exposure. For organizations unable to immediately patch, implement network-level access controls by restricting HTTP/HTTPS access to the GINA UI endpoint to trusted internal IP ranges only, using a web application firewall (WAF) or reverse proxy to enforce authentication on the vulnerable endpoint before forwarding requests to SEPPmail. Additionally, audit server logs for anomalous requests to the GINA UI endpoint that may indicate reconnaissance activity. Disable the GINA UI entirely if it is not actively used and the classic administration interface suffices, which eliminates the exposure until patching is feasible. Monitor environment and environment variable access through system logging to detect exploitation attempts. See https://downloads.seppmail.com/extrelnotes/150/ERN15.0.html#security for patch release notes and deployment guidance.
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Same technique Information Disclosure
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External POC / Exploit Code
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