Open-Xchange OX Dovecot Pro up to 2.4.0/3.1.0 ManageSieve Service denial of service

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

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.

The vulnerability scanner Nessus provides a plugin with the ID 304087 (Linux Distros Unpatched Vulnerability : CVE-2025-59032), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (304087) and CERT Bund (WID-SEC-2026-0891). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Open Source Dovecot

Productinfo

Type

Vendor

Name

Version

License

Website

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

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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

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 304087
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-59032

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
03/31/2026 +3 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
CERT Bund: WID-SEC-2026-0891 - Dovecot: Mehrere Schwachstellen

Entryinfo

Created: 03/27/2026 09:52
Updated: 03/31/2026 00:51
Changes: 03/27/2026 09:52 (64), 03/28/2026 01:25 (7), 03/31/2026 00:51 (2)
Complete: 🔍
Cache ID: 216:E05:103

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