PT-2026-22891 · Seppmail · Seppmail Secure Email Gateway

Andris Suter-Dörig + 2 · Published 2026-03-04 · Updated 2026-03-05 · CVE-2026-27445

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:H/SA:N

Name of the Vulnerable Software and Affected Versions SEPPmail Secure Email Gateway versions prior to 15.0.1

Description The SEPPmail Secure Email Gateway does not correctly validate the origin of PGP signatures. This allows for signature spoofing, potentially enabling an attacker to forge signatures on email communications.

Recommendations Update to version 15.0.1 or later.

Fix

Improper Verification of Cryptographic Signature

Weakness Enumeration

CWE-347

Related Identifiers

CVE-2026-27445

Affected Products

Seppmail Secure Email Gateway

References · 7

• https://osv.dev/vulnerability/CVE-2026-27445 · Vendor Advisory
• https://downloads.seppmail.com/extrelnotes/150/ERN15.0.html#seppmail-vulnerability-disclosure · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-27445 · Security Note
• https://t.me/CVEtracker/46298 · Telegram Post
• https://twitter.com/infoflowcloud/status/2029127502455619602 · Twitter Post
• https://t.me/cveNotify/154349 · Telegram Post
• https://twitter.com/CVEnew/status/2029125970762903860 · Twitter Post