CVE-2026-27445
Received Received - Intake
PGP Signature Spoofing in SEPPmail Secure Email Gateway

Publication date: 2026-03-04

Last updated on: 2026-03-05

Assigner: Switzerland Government Common Vulnerability Program

Description
SEPPmail Secure Email Gateway before version 15.0.1 does not properly verify that a PGP signature was generated by the expected key, allowing signature spoofing.
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Published
2026-03-04
Last Modified
2026-03-05
Generated
2026-06-16
AI Q&A
2026-03-04
EPSS Evaluated
2026-06-15
NVD
CVE-2026-27445
EUVD
EUVD-2026-9381
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
seppmail seppmail to 15.0.1 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-347 The product does not verify, or incorrectly verifies, the cryptographic signature for data.
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Executive Summary

This vulnerability exists in SEPPmail Secure Email Gateway versions before 15.0.1. It occurs because the software does not properly verify that a PGP signature was generated by the expected key. As a result, an attacker can spoof the signature, making it appear as if a message was signed by a trusted party when it was not.

Impact Analysis

The impact of this vulnerability is that an attacker could forge PGP signatures on emails, potentially allowing them to impersonate trusted senders. This could lead to acceptance of malicious or fraudulent emails as legitimate, undermining trust in email communications and possibly leading to unauthorized actions or disclosure of sensitive information.

Compliance Impact

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Detection Guidance

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