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CVE-2026-40020

🗓️ 12 May 2026 13:28:46Reported by OXType 
cvelist
 cvelist
🔗 www.cve.org👁 48 Views

Attacker uses IMAP SETACL to grant anyone on dovecot, spamming folders for all users.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-40020
12 May 202613:28
–attackerkb
alpinelinux
AlpineLinux
CVE-2026-40020
12 May 202613:28
–alpinelinux
astralinux
AstraLinux
Astra Linux – Vulnerability in dovecot
14 Sep 202612:01
–astralinux
bdu_fstec
BDU FSTEC
Dovecot ACL DoS
23 Jul 202600:00
–bdu_fstec
cnnvd
CNNVD
Open-Xchange OX Dovecot Pro Access Control Vulnerability
12 May 202600:00
–cnnvd
cve
CVE
CVE-2026-40020
12 May 202613:28
–cve
debian
Debian
[SECURITY] [DLA 4617-1] dovecot security update
5 Jun 202612:28
–debian
debian
Debian
[SECURITY] [DSA 6313-1] dovecot security update
31 May 202618:25
–debian
debiancve
Debian CVE
CVE-2026-40020
12 May 202613:28
–debiancve
nessus
Tenable Nessus
Debian dla-4617 : dovecot-auth-lua - security update
5 Jun 202600:00
–nessus
Rows per page
[
  {
    "defaultStatus": "unaffected",
    "modules": [
      "core"
    ],
    "product": "OX Dovecot Pro",
    "vendor": "Open-Xchange GmbH",
    "versions": [
      {
        "lessThanOrEqual": "2.3.0",
        "status": "affected",
        "version": "0",
        "versionType": "semver"
      }
    ]
  }
]

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12 May 2026 13:39Current
CVSS 3.13.1
EPSS0.0029
SSVC
48