Email Address Enumeration Vulnerability in SEPPmail Secure Email Gateway
CVE-2026-114420

6.9MEDIUM

Key Information:

Vendor

Seppmail Ag

Status
Seppmail Secure Email Gateway (seg)
Vendor
CVE Published:
4 November 2026

What is CVE-2026-114420?

The SEPPmail Secure Email Gateway prior to version 15.1.1 has a significant vulnerability that allows remote unauthenticated attackers to enumerate email addresses through its GINA web interface. The flaw arises due to the failure to properly neutralize LDAP metacharacters in unauthenticated account-selection inputs, which can be exploited for information gathering by malicious actors.

Affected Version(s)

SEPPmail Secure Email Gateway (SEG) 0 < 15.1.1

References

https://docs.seppmail.com/en/20_revision-history.html

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Synack, Inc
.