VULNERABILITY INTELLIGENCE

CVE-2026-40020

CVSS score3.1 LOW
EPSS probability0.26%
CISA KEVNot currently listed
Published2026-05-12
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

Description

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.

Weakness classification

  • security@open-xchange.com: CWE-284
  • nvd@nist.gov: NVD-CWE-noinfo

Primary references