MinorCritical vulnerability

CVE-2026-125393 (CVSS 7.1)

NVD · officialPublished Nov 10, 2026Risk 23/100

MailEnable Enterprise Premium before 10.62 contains a heap overflow vulnerability in the IMAP X-FB-FETCH command that allows authenticated users to overflow a fixed 0x400-byte heap buffer. Attackers can supply an X-FB-USER address longer than about 1016 bytes, which is formatted without a length check, to crash the IMAP service and cause denial of service.

Technical details

CVSS

7.1

AV:NetworkAC:LowPR:LowUI:None

Evidence and sources

This record is attributed to NVD. Exploitation status and remediation guidance are kept separate from the vulnerability's technical severity.

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