EUVD-2026-18162
GHSA-239h-g863-fm9x
7.7
CVSS 4.0
Share
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/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-2026-18162
Analysis Generated
Apr 02, 2026 - 09:00 vuln.today
CVE Published
Apr 02, 2026 - 08:34 nvd
HIGH 7.7
Description
SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to bypass subject sanitization and forge tags such as [signed OK].
Analysis
SEPPmail Secure Email Gateway before version 15.0.3 allows remote attackers to bypass subject line sanitization controls and forge authentication tags such as [signed OK], enabling email spoofing attacks that could deceive recipients into trusting fraudulent or malicious messages. The vulnerability affects all versions prior to 15.0.3 and has been publicly disclosed by NCSC.ch; no public exploit code or active exploitation has been independently confirmed at time of analysis.
Sign in for full analysis, threat intelligence, and remediation guidance.
Priority Score
39
Low
Medium
High
Critical
KEV: 0
EPSS: +0.1
CVSS: +38
POC: 0
Share
External POC / Exploit Code
Leaving vuln.today
Destination URL
POC code from unknown sources may be malicious, contain backdoors, or be fake.
Always review and test exploit code in a safe, isolated environment (VM/sandbox).
Verify the source reputation and cross-reference with known databases (Exploit-DB, GitHub Security).