---
id: "CVE-2026-114420"
kind: "vulnerability"
aliases: ["CVE-2026-114420"]
title: "SEPPmail gateway: unauthenticated LDAP input lets attackers enumerate email addresses"
severity: "medium"
cvss: 6.9
epss: null
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["email-gateway", "ldap", "seppmail", "vendor"]
not_affected_if: ["version-15.1.1-or-later"]
published_at: "2026-11-04T09:17:40+00:00"
first_seen_at: "2026-11-04T09:26:08+00:00"
updated_at: "2026-11-04T09:26:51+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-114420", "first_seen_at": "2026-11-04T09:26:08+00:00"}]
---

# SEPPmail gateway: unauthenticated LDAP input lets attackers enumerate email addresses

SEPPmail Secure Email Gateway before 15.1.1 does not escape LDAP metacharacters in an account-selection input of its GINA web interface. A remote attacker with no login can use it to enumerate valid email addresses.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed SEPPmail gateway version against `15.1.1` in the administration interface or release notes.

## Fix

- SEPPmail Secure Email Gateway: move to `15.1.1` or later.

## Timeline

- 2026-11-04T09:26:08+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-114420

## From the sources

SEPPmail Secure Email Gateway before 15.1.1 does not neutralize LDAP metacharacters in an unauthenticated account-selection input in its GINA web interface. A remote unauthenticated attacker can enumerate email addresses.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_