CVE-2026-40204 - Vulnerability Details - OpenCVE

None None None No publicly available exploits are known.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Vendors	Products
Open-xchange	Ox Dovecot Ce Ox Dovecot Pro

No data.

No data.

References

Link	Providers
https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0003.json
https://nvd.nist.gov/vuln/detail/CVE-2026-40204
https://www.cve.org/CVERecord?id=CVE-2026-40204

History

Tue, 01 Sep 2026 14:45:00 +0000

Type	Values Removed	Values Added
First Time appeared		Open-xchange Open-xchange ox Dovecot Ce Open-xchange ox Dovecot Pro
Vendors & Products		Open-xchange Open-xchange ox Dovecot Ce Open-xchange ox Dovecot Pro

Tue, 01 Sep 2026 12:15:00 +0000

Type	Values Removed	Values Added
Title	Improper Access Control in Open‑Xchange OX Dovecot	dovecot: dovecot: lda_mailbox_autocreate can bypass acl restrictions
Weaknesses		CWE-1220
References		https://nvd.nist.gov/vuln/detail/CVE-2026-40204 https://www.cve.org/CVERecord?id=CVE-2026-40204
Metrics	threat_severity `None`	threat_severity `Low`

Fri, 28 Aug 2026 15:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Fri, 28 Aug 2026 14:00:00 +0000

Type	Values Removed	Values Added
Title		Improper Access Control in Open‑Xchange OX Dovecot

Fri, 28 Aug 2026 11:30:00 +0000

Type	Values Removed	Values Added
Description		None None None No publicly available exploits are known.
Weaknesses		CWE-284
References		https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0003.json
Metrics		cvssV3_1 `{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N'}`

MITRE

Status: PUBLISHED

Assigner: OX

Published: 2026-08-28T10:12:23.236Z

Updated: 2026-08-28T14:56:40.510Z

Reserved: 2026-04-10T07:11:39.060Z

Link: CVE-2026-40204

Vulnrichment

Updated: 2026-08-28T14:56:36.074Z

NVD

Status : Received

Published: 2026-08-28T12:16:29.023

Modified: 2026-08-28T16:17:57.357

Link: CVE-2026-40204

Redhat

Severity : Low

Publid Date: 2026-08-28T10:12:23Z

Links: CVE-2026-40204 - Bugzilla

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-40204", "assignerOrgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981", "state": "PUBLISHED", "assignerShortName": "OX", "dateReserved": "2026-04-10T07:11:39.060Z", "datePublished": "2026-08-28T10:12:23.236Z", "dateUpdated": "2026-08-28T14:56:40.510Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "modules": ["core"], "product": "OX Dovecot Pro", "vendor": "Open-Xchange GmbH", "versions": [{"lessThan": "2.3.22.2", "status": "affected", "version": "2.3.0", "versionType": "semver"}, {"lessThan": "3.0.7", "status": "affected", "version": "3.0.0", "versionType": "semver"}, {"lessThan": "3.1.6", "status": "affected", "version": "3.1.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "modules": ["core"], "product": "OX Dovecot CE", "vendor": "Open-Xchange GmbH", "versions": [{"lessThan": "2.4.5", "status": "affected", "version": "2.3.0", "versionType": "semver"}]}], "descriptions": [{"lang": "en", "value": "None None None No publicly available exploits are known."}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.1, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-284", "description": "Improper Access Control", "lang": "en", "type": "cwe"}]}], "providerMetadata": {"orgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981", "shortName": "OX", "dateUpdated": "2026-08-28T10:30:49.748Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0003.json"}], "source": {"defect": "DOV-9099", "discovery": "EXTERNAL"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-28T14:56:29.278493Z", "id": "CVE-2026-40204", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-28T14:56:40.510Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-40204", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-28T14:56:29.278493Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-28T14:56:36.074Z"}}], "cna": {"source": {"defect": "DOV-9099", "discovery": "EXTERNAL"}, "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 3.1, "attackVector": "NETWORK", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Open-Xchange GmbH", "modules": ["core"], "product": "OX Dovecot Pro", "versions": [{"status": "affected", "version": "2.3.0", "lessThan": "2.3.22.2", "versionType": "semver"}, {"status": "affected", "version": "3.0.0", "lessThan": "3.0.7", "versionType": "semver"}, {"status": "affected", "version": "3.1.0", "lessThan": "3.1.6", "versionType": "semver"}], "defaultStatus": "unaffected"}, {"vendor": "Open-Xchange GmbH", "modules": ["core"], "product": "OX Dovecot CE", "versions": [{"status": "affected", "version": "2.3.0", "lessThan": "2.4.5", "versionType": "semver"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0003.json", "tags": ["vendor-advisory"]}], "descriptions": [{"lang": "en", "value": "None None None No publicly available exploits are known."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "cwe", "cweId": "CWE-284", "description": "Improper Access Control"}]}], "providerMetadata": {"orgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981", "shortName": "OX", "dateUpdated": "2026-08-28T10:30:49.748Z"}}}, "cveMetadata": {"cveId": "CVE-2026-40204", "state": "PUBLISHED", "dateUpdated": "2026-08-28T14:56:40.510Z", "dateReserved": "2026-04-10T07:11:39.060Z", "assignerOrgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981", "datePublished": "2026-08-28T10:12:23.236Z", "assignerShortName": "OX"}, "dataVersion": "5.2"}