Use of hardcoded cryptographic key in BlowFish.cpp in hMailServer 5.8.6 and 5.6.9-beta…
Priority MEDIUM 54CWE-321Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-321.
Summary
Use of hardcoded cryptographic key in BlowFish.cpp in hMailServer 5.8.6 and 5.6.9-beta allows attacker to decrypt passwords used in database connections from hMailServer.ini config file.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00357 29th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:hmailserver:hmailserver:5.6.9:beta:*:*:*:*:*:* | 5.6.9 beta | Vulnerable | Hmailserver |
| cpe:2.3:a:hmailserver:hmailserver:5.8.6:*:*:*:*:*:*:* | 5.8.6 | Vulnerable | Hmailserver |
- cpe:2.3:a:hmailserver:hmailserver:5.6.9:beta:*:*:*:*:*:* Versions 5.6.9 beta Vulnerable ·Hmailserver
- cpe:2.3:a:hmailserver:hmailserver:5.8.6:*:*:*:*:*:*:* Versions 5.8.6 Vulnerable ·Hmailserver
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-52373
- 2026-10-03 Alias added: GHSA-244x-c938-j3qj
References
More Hmailserver vulnerabilities
- TI-2025-32547 An issue in hMailServer v.5.8.6 allows a local attacker to obtain sensitive information… CVSS 3.1MEDIUM 5.1
- TI-2025-32549 Use of hardcoded cryptographic key in Encryption.cs in hMailServer 5.8.6 and 5.6.9-beta… CVSS 3.1MEDIUM 4.6
- TI-2013-04764 HMailServer 5.3.x and prior: Memory Corruption which could cause DOS CVSS 3.1MEDIUM 5.9
- TI-2008-03520 Unspecified vulnerability in the IMAP server in hMailServer 4.4.1 allows remote… CVSS 2.0MEDIUM 4.3
Sources
- CVE-2025-52373 · CVE Program
- CVE-2025-52373 · NVD
- FIRST EPSS
- GHSA-244x-c938-j3qj · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences