What’s Vulnerable › Vulnerabilities

CVE-2026-40018

• Severity: high (CVSS 7.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-28 · updated 2026-09-03
• Weakness: CWE-89

Description

None None None No publicly available exploits are known.

Affected products

• Open-Xchange GmbH OX Dovecot CE: from 2.3.0 before 2.4.5 — fixed in 2.4.5
• Open-Xchange GmbH OX Dovecot Pro: from 2.3.0 before 3.1.6 — fixed in 3.1.6

How to fix

Upgrade to a fixed version: Open-Xchange GmbH OX Dovecot CE 2.4.5; Open-Xchange GmbH OX Dovecot Pro 3.1.6. Check the vendor advisory for mitigations.

References

• https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0003.json

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