CVE-2024-51123Public exploitNetwork attack vector

Plaintext email disclosure via message-processing race

Published Feb 12, 2025 · Updated Mar 22, 2025

Information disclosure in Zertificon Z1 SecureMail Gateway 4.44.2-7240-debian12 allows remote attackers to expose email contents. Concurrent POST requests to /compose-pdf.xhtml?convid=[id] create a message-processing race that lets some outgoing messages bypass encryption. Exploitation requires many rapid messages, and disclosure occurs only if an unencrypted message is intercepted.

CVSS severity7.5
High
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Zertificon Z1 SecureMail Gateway 4.44.2-7240-debian12 allows remote attackers to expose email contents. Concurrent POST requests to /compose-pdf.xhtml?convid=[id] create a message-processing race that lets some outgoing messages bypass encryption. Exploitation requires many rapid messages, and disclosure occurs only if an unencrypted message is intercepted.

The record

CVE
CVE-2024-51123
Published
Feb 12, 2025
Updated
Mar 22, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-200, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 12, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 22, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS: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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1557Adversary-in-the-Middle

Public exploit references

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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