CVE-2025-59032 | Open-Xchange OX Dovecot Pro up to 2.4.0/3.1.0 ManageSieve Service denial of service (adv-2026-0001)

VDB-353850 · CVE-2025-59032 · ADV-2026-0001 OPEN-XCHANGE OX DOVECOT PRO UP TO 2.4.0/3.1.0 MANAGESIEVE SERVICE DENIAL OF SERVICE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.3 $0-$5k 2.52+ Summaryinfo A vulnerability classified as problematic was found in Open-Xchange OX Dovecot Pro up to 2.4.0/3.1.0. This affects an unknown part of the component ManageSieve Service. The manipulation results in denial of service. This vulnerability is known as CVE-2025-59032. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised. Detailsinfo A vulnerability was found in Open-Xchange OX Dovecot Pro up to 2.4.0/3.1.0. It has been classified as problematic. Affected is an unknown function of the component ManageSieve Service. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. CVE summarizes: ManageSieve AUTHENTICATE command crashes when using literal as SASL initial response. This can be used to crash ManageSieve service repeatedly, making it unavailable for other users. Control access to ManageSieve port, or disable the service if it's not needed. Alternatively upgrade to a fixed version. No publicly available exploits are known. The advisory is available at documentation.open-xchange.com. This vulnerability is traded as CVE-2025-59032 since 09/08/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project. Upgrading eliminates this vulnerability. Productinfo Type Mail Server Software Vendor Open-Xchange Name OX Dovecot Pro Version 2.0 2.1 2.2 2.3 2.4.0 3.0 3.1.0 License open-source Website Vendor: https://www.open-xchange.com/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.4 VulDB Meta Temp Score: 6.3 VulDB Base Score: 5.3 VulDB Temp Score: 5.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 7.5 CNA Vector: 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Denial of service CWE: CWE-404 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Timelineinfo 09/08/2025 CVE reserved 03/27/2026 +200 days Advisory disclosed 03/27/2026 +0 days VulDB entry created 03/27/2026 +0 days VulDB entry last update Sourcesinfo Vendor: open-xchange.com Advisory: adv-2026-0001 Status: Confirmed CVE: CVE-2025-59032 (🔒) GCVE (CVE): GCVE-0-2025-59032 GCVE (VulDB): GCVE-100-353850 Entryinfo Created: 03/27/2026 09:52 Changes: 03/27/2026 09:52 (64) Complete: 🔍 Cache ID: 99:9F4:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸