CVE-2026-29132Network attack vector

Protected-email disclosure via bypassed second-password check

Published Apr 2, 2026 · Updated Apr 2, 2026

Authentication bypass in SEPPmail Secure Email Gateway before 15.0.3 allows remote attackers to read a victim's protected GINA emails. The GINA email-access path fails to enforce its second-password check after access to the victim's GINA account; no narrower code-level locus is public. Exploitation requires control of a victim's GINA account and exposes protected message contents without reported write or service-interruption impact.

CVSS severity6.3
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in SEPPmail Secure Email Gateway before 15.0.3 allows remote attackers to read a victim's protected GINA emails. The GINA email-access path fails to enforce its second-password check after access to the victim's GINA account; no narrower code-level locus is public. Exploitation requires control of a victim's GINA account and exposes protected message contents without reported write or service-interruption impact.

The record

CVE
CVE-2026-29132
Published
Apr 2, 2026
Updated
Apr 2, 2026
Vendor
SEPPmail
Product
Secure Email Gateway
Classifications
CWE-306, CAPEC-87, T1190, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <15.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

SEPPmail · Secure Email Gatewayversion=0 <15.0.3

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
6.3NCSC.chCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
CAPEC-87Forceful Browsing
T1190Exploit Public-Facing Application
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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