CVE Explorer

CVE-2026-40020

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.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:35122a7fb7b49a3ff1cbd11093b1408cfa7c150f9e50339727499ad9b90c3f53

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"defaultStatus":"unaffected","modules":["core"],"product":"OX Dovecot Pro","vendor":"Open-Xchange GmbH","versions":[{"lessThanOrEqual":"2.3.0","status":"affected","version":"0","versionType":"semver"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:3b96980604b0af8a58b21727be241005b0084eb0e70c0042b2b733859a10a1f5 · sha256:07b7aee35b995088… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":3.1,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:3b96980604b0af8a58b21727be241005b0084eb0e70c0042b2b733859a10a1f5 · sha256:07b7aee35b995088… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-284","description":"Improper Access Control","lang":"en","type":"cwe"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:3b96980604b0af8a58b21727be241005b0084eb0e70c0042b2b733859a10a1f5 · sha256:07b7aee35b995088… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion

{"tags":["vendor-advisory"],"url":"https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0002.json"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:3b96980604b0af8a58b21727be241005b0084eb0e70c0042b2b733859a10a1f5 · sha256:07b7aee35b995088… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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