PatchTheCVEhmailserver vulnerabilities and fixes
Recent CVEs affecting hmailserver, with upgrade or downgrade steps. 3 tracked.
hmailserver has 3 tracked vulnerabilities, 0 critical. A fixed release or vendor patch exists for 0. Most recent: 2025-07-21. Highest priority: CVE-2025-52373 (score 28/100).
- CVE-2025-52374 MEDIUM 4.6 DOWNGRADE Use of hardcoded cryptographic key in Encryption.cs in hMailServer 5.8.6 and 5.6.9-beta allows attacker to dec
- CVE-2025-52373 MEDIUM 4.6 DOWNGRADE Use of hardcoded cryptographic key in BlowFish.cpp in hMailServer 5.8.6 and 5.6.9-beta allows attacker to decr
- CVE-2025-52372 MEDIUM 5.1 DOWNGRADE An issue in hMailServer v.5.8.6 allows a local attacker to obtain sensitive information via the hmailserver/in
FAQ
How do I fix hmailserver vulnerabilities?
Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.
Is hmailserver being exploited right now?
None of the tracked hmailserver CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which hmailserver CVE should I patch first?
CVE-2025-52373 currently ranks highest (28/100): Use of hardcoded cryptographic key in BlowFish.cpp in hMailServer 5.8.6 and 5.6.9-beta allows attacker to decr.