Metrics
Affected Vendors & Products
No advisories yet.
Solution
Upgrade to hMailServer 6.3.6, which verifies DANE-TA as well as DANE-EE records and requires TLS to a host whose validated TLSA records are all unusable. Until then, an SMTP route for each recipient domain concerned that names its mail exchangers with the connection security 'STARTTLS (required)' prevents delivery in cleartext to that domain.
Workaround
No workaround given by the vendor.
Thu, 08 Oct 2026 15:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Thu, 08 Oct 2026 12:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Progressive Robot
Progressive Robot hmailserver |
|
| Vendors & Products |
Progressive Robot
Progressive Robot hmailserver |
Thu, 08 Oct 2026 11:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Progressive Robot hMailServer 6.0.0 through 6.3.5 does not enforce TLS for outbound SMTP delivery to a mail exchanger whose DNSSEC-validated TLSA records contain no DANE-EE (usage 3) record, contrary to RFC 7672 section 2.2. The server used only DANE-EE records and treated a validated TLSA record set consisting of DANE-TA (usage 2) or otherwise unusable records as if no records were published, so delivery to such a host fell back to opportunistic TLS. An attacker with an active position on the network path between the server and the recipient's mail exchanger can suppress or break the STARTTLS negotiation and cause messages to be delivered in cleartext, where they can be read and modified. | |
| Title | Cleartext Transmission of Sensitive Information in hMailServer | |
| Weaknesses | CWE-319 | |
| References |
| |
| Metrics |
cvssV3_1
|
Projects
Sign in to view the affected projects.
Status: PUBLISHED
Assigner: GitLab
Published:
Updated: 2026-10-08T14:25:42.915Z
Reserved: 2026-10-02T10:10:21.800Z
Link: CVE-2026-104704
Updated: 2026-10-08T14:25:39.723Z
Status : Received
Published: 2026-10-08T11:16:44.457
Modified: 2026-10-08T15:17:32.270
Link: CVE-2026-104704
No data.
OpenCVE Enrichment
Updated: 2026-10-08T12:45:18Z