CVE-2026-33607: Uncontrolled Resource Consumption in Open-Xchange GmbH OX Dovecot Pro
Description
CVE-2026-33607 is a medium severity vulnerability in Open-Xchange GmbH's OX Dovecot Pro. An attacker with valid credentials can exploit the IMAP LIST command to cause excessive CPU consumption, potentially leading to degradation or denial of service of the IMAP service. No public exploits are known. Mitigation involves monitoring for abnormal CPU usage, terminating offending processes, locking the associated account, or installing a fixed version if available.
CVSS v3.1
Score 4.3medium
Affected software
Open-Xchange GmbH
OX Dovecot Pro
Open-Xchange GmbH
OX Dovecot CE
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability allows an authenticated attacker to use the IMAP LIST command to consume excessive CPU resources in OX Dovecot Pro, causing service degradation or denial of service. The CVSS 3.1 base score is 4.3 (medium), reflecting the impact on availability without confidentiality or integrity loss. No official patch or remediation level is provided in the available data. No exploits are publicly known.
Potential Impact
The impact is limited to availability degradation or denial of service of the IMAP service. There is no impact on confidentiality or integrity. An attacker must have valid credentials to exploit this vulnerability.
Mitigation Recommendations
Since no official patch or remediation level is indicated, it is recommended to monitor the system for abnormal CPU usage related to IMAP LIST commands, terminate offending processes, and lock the associated user accounts. Installing a fixed version is advised if and when it becomes available. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- OX
- Date Reserved
- 2026-03-23T12:58:38.267Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a916f87acd9273b49cf91c1
Added to database: 08/28/2026, 11:22:47 UTC
Last enriched: 09/10/2026, 02:53:25 UTC
Last updated: 10/12/2026, 18:48:19 UTC
Views: 34
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