CVE-2026-29131Network attack vector

Encrypted-email disclosure via recipient LDAP injection

Published Apr 2, 2026 · Updated Apr 2, 2026

LDAP injection in SEPPmail Secure Email Gateway before 15.0.3 allows attackers to read encrypted email intended for other users. The PGP decryption recipient lookup incorporates a specially crafted email address into an LDAP query without neutralizing LDAP operators. The gateway must process that address during PGP recipient resolution; the resulting impact is limited to disclosure of protected message contents.

CVSS severity7.5
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

LDAP injection in SEPPmail Secure Email Gateway before 15.0.3 allows attackers to read encrypted email intended for other users. The PGP decryption recipient lookup incorporates a specially crafted email address into an LDAP query without neutralizing LDAP operators. The gateway must process that address during PGP recipient resolution; the resulting impact is limited to disclosure of protected message contents.

The record

CVE
CVE-2026-29131
Published
Apr 2, 2026
Updated
Apr 2, 2026
Vendor
SEPPmail
Product
Secure Email Gateway
Classifications
CWE-90, CAPEC-136, CAPEC-116, T1190
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

4.9NCSC.chCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A: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-90Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')
CAPEC-136LDAP Injection
CAPEC-116Excavation
T1190Exploit Public-Facing Application

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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