CVE-2025-52374Public exploit

Credential disclosure via hard-coded encryption key

Published Jul 21, 2025 · Updated Jul 22, 2025

Hard-coded key use in hMailServer 5.8.6 and 5.6.9-beta allows local users to decrypt saved remote-administration passwords. Encryption.Encrypt derives a Rijndael key and IV from constant values before hMailAdmin.exe.config stores the resulting ciphertext. Reading that per-user configuration file is required, and recovered credentials grant access only to admin consoles whose connections were saved.

CVSS severity4.6
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hard-coded key use in hMailServer 5.8.6 and 5.6.9-beta allows local users to decrypt saved remote-administration passwords. Encryption.Encrypt derives a Rijndael key and IV from constant values before hMailAdmin.exe.config stores the resulting ciphertext. Reading that per-user configuration file is required, and recovered credentials grant access only to admin consoles whose connections were saved.

The record

CVE
CVE-2025-52374
Published
Jul 21, 2025
Updated
Jul 22, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-321, T1555
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Jul 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 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 vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.6CISA ADP VulnrichmentCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/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)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-321Use of Hard-coded Cryptographic Key
T1555Credentials from Password Stores

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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