CVE-2026-40020
CVSS Score
3.1
EPSS Score
0.0%
EPSS Percentile
0th
Attacker can use the IMAP SETACL command to inject the anyone permission to user's dovecot-acl file even if imap_acl_allow_anyone=no. This causes folders to be spammed to all users. The impact is limited to being able to spam folders to other users, no unexpected access is gained. Install to fixed version. No publicly available exploits are known.
| CWE | CWE-284 |
| Vendor | open-xchange gmbh |
| Product | ox dovecot pro |
| Published | May 12, 2026 |
| Last Updated | May 12, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
Open-Xchange GmbH / OX Dovecot Pro
0 ≤ 2.3.0