CVE-2026-27856
CVSS Score
7.4
EPSS Score
0.0%
EPSS Percentile
9th
Doveadm credentials are verified using direct comparison which is susceptible to timing oracle attack. An attacker can use this to determine the configured credentials. Figuring out the credential will lead into full access to the affected component. Limit access to the doveadm http service port, install fixed version. No publicly available exploits are known.
| CWE | CWE-287 |
| Vendor | open-xchange gmbh |
| Product | ox dovecot pro |
| Published | Mar 27, 2026 |
| Last Updated | Mar 27, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
Open-Xchange GmbH / OX Dovecot Pro
0 ≤ 2.3.0