What is the CVSS score of CVE-2026-27445?

CVE-2026-27445 has a CVSS 3.1 base score of 5.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Seppmail are affected by CVE-2026-27445?

CVE-2026-27445 presents moderate security risk, a signature bypass vulnerability rated CVSS 5.3. Exploitation could compromise the security of affected deployments.

How to fix or mitigate CVE-2026-27445?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Seppmail CVE-2026-27445

MEDIUM

Improper Verification of Cryptographic Signature (CWE-347)

2026-03-04 vulnerability@ncsc.ch

Information Disclosure Seppmail

5.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.3 MEDIUM

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:05 vuln.today

CVE Published

Mar 04, 2026 - 09:15 nvd

MEDIUM 5.3

DescriptionCVE.org

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.

AnalysisAI

Seppmail versions up to 15.0.1 is affected by improper verification of cryptographic signature (CVSS 5.3).

Technical ContextAI

This vulnerability (CWE-347: Improper Verification of Cryptographic Signature) affects Seppmail. 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.