Description
SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to cause attacker-controlled certificates to be used for future encryption to a victim by adding the certificates to S/MIME signatures.
Scores
CVSS v3
5.3
EPSS
0.0002
EPSS Percentile
5.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-295
Status
published
Products (2)
SEPPmail/Secure Email Gateway
< 15.0.3
seppmail/secure_email_gateway
< 15.0.3
Published
Apr 02, 2026
Tracked Since
Apr 02, 2026