EUVD-2026-18156
GHSA-whc5-mvj9-gjqw
6.3
CVSS 4.0
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CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/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-2026-18156
Analysis Generated
Apr 02, 2026 - 09:00 vuln.today
CVE Published
Apr 02, 2026 - 08:47 nvd
MEDIUM 6.3
Description
SEPPmail Secure Email Gateway before version 15.0.3 allows attackers with a specially crafted email address to claim another user's PGP signature as their own.
Analysis
SEPPmail Secure Email Gateway before version 15.0.3 allows remote attackers to impersonate other users by claiming their PGP signatures through a specially crafted email address, enabling signature forgery and identity spoofing in encrypted email communications. The vulnerability exploits LDAP injection mechanisms to manipulate signature verification, affecting all versions prior to 15.0.3. …
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Priority Score
32
Low
Medium
High
Critical
KEV: 0
EPSS: +0.0
CVSS: +32
POC: 0
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