EUVD-2026-18168
GHSA-vc5m-vgvg-698r
7.8
CVSS 4.0
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CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:H/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X
Lifecycle Timeline
3
EUVD ID Assigned
Apr 02, 2026 - 09:00 euvd
EUVD-2026-18168
Analysis Generated
Apr 02, 2026 - 09:00 vuln.today
CVE Published
Apr 02, 2026 - 08:50 nvd
HIGH 7.8
Description
SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to bypass subject sanitization and forge security tags using Unicode lookalike characters.
Analysis
SEPPmail Secure Email Gateway before version 15.0.3 allows attackers to bypass subject sanitization and forge security tags by exploiting Unicode lookalike characters, enabling email spoofing and phishing attacks that evade gateway security controls. This vulnerability affects all versions prior to 15.0.3, impacts organizations relying on SEPPmail for email security, and requires immediate patching. …
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Priority Score
39
Low
Medium
High
Critical
KEV: 0
EPSS: +0.1
CVSS: +39
POC: 0
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External POC / Exploit Code
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