CVE-2026-27445
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
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| seppmail | seppmail | to 15.0.1 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-347 | The product does not verify, or incorrectly verifies, the cryptographic signature for data. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know