CVE-2026-29142
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedSEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to forge a GINA-encrypted email.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceSEPPmail Secure Email Gateway versions before 15.0.3 contain a vulnerability in the GINA email encryption mechanism that allows an attacker to forge GINA-encrypted emails. This represents a cryptographic authentication weakness where the encryption validation process can be bypassed to produce valid-looking but fraudulent encrypted messages. The CVSS 5.3 score indicates moderate severity with low attack complexity.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 15.0.3CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify SEPPmail Secure Email Gateway versionLocate the installed version of SEPPmail Secure Email Gateway in the system administration interface, about page, or via command-line tools provided by the product documentationAffected if The installed version is any version before 15.0.3
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Verify GINA encryption is in useCheck the email gateway configuration to determine if GINA email encryption is enabled for inbound or outbound email processingAffected if GINA encryption is actively configured or used in the email flow
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Review email encryption logs for anomaliesExamine SEPPmail gateway logs related to GINA-encrypted email processing, looking for any validation failures, bypass attempts, or unusual encryption patternsAffected if Logs show any indicators of forged or invalidly validated GINA-encrypted messages
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Inspect email authentication configurationCheck whether additional email authentication controls such as DKIM signing are properly configured as a defense-in-depth measureAffected if GINA encryption is used without supplementary authentication controls
The environment is affected if SEPPmail Secure Email Gateway version is below 15.0.3 and GINA email encryption is actively used for processing messages.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped15.0.3
Upgrade SEPPmail Secure Email Gateway to version 15.0.3 or later to remediate the GINA encryption forgery vulnerability. As a defense-in-depth measure, implement additional email authentication controls such as DKIM signing and verify email origins through established channels.
15.0.3
- 1. Create a complete backup of the current SEPPmail Secure Email Gateway configuration and all encrypted emails
- 2. Download version 15.0.3 from the vendor's secure download portal at downloads.seppmail.com
- 3. Review the upgrade documentation provided with version 15.0.3 for any specific prerequisites
- 4. Apply the upgrade to the SEPPmail Secure Email Gateway following the vendor's standard upgrade procedure
- 5. Verify the upgrade was successful by checking the version number in the administrative interface
- 6. Test GINA-encrypted email functionality to confirm the cryptographic vulnerability is resolved
- 7. Verify that normal email flow operations are functioning correctly
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-29142 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-29142 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data