CVE-2026-27856: Improper Authentication in Open-Xchange GmbH OX Dovecot Pro
Doveadm credentials are verified using direct comparison which is susceptible to timing oracle attack. An attacker can use this to determine the configured credentials. Figuring out the credential will lead into full access to the affected component. Limit access to the doveadm http service port, install fixed version. No publicly available exploits are known.
CVE-2026-27856: Improper Authentication in Open-Xchange GmbH OX Dovecot Pro
Description
Doveadm credentials are verified using direct comparison which is susceptible to timing oracle attack. An attacker can use this to determine the configured credentials. Figuring out the credential will lead into full access to the affected component. Limit access to the doveadm http service port, install fixed version. No publicly available exploits are known.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- OX
- Date Reserved
- 2026-02-24T08:46:09.373Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69c63ffa3c064ed76f701a57
Added to database: 3/27/2026, 8:29:46 AM
Last updated: 3/27/2026, 8:30:04 AM
Views: 1
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