CVE-2025-59032

HIGH

OX Dovecot Pro < 2.4.0 and < 3.1.0 - Denial of Service via ManageSieve AUTHENTICATE Command

Title source: llm

Description

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.

References (1)

Core 1

Core References

Vendor Advisory vendor-advisory

https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.json

Scores

CVSS v3 7.5

EPSS 0.0008

EPSS Percentile 23.2%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-20

Status published

Products (4)

dovecot/dovecot < 2.4.3

open-xchange/dovecot < 3.1.3

Open-Xchange GmbH/OX Dovecot Pro < 2.4.0

Open-Xchange GmbH/OX Dovecot Pro < 3.1.0

Published Mar 27, 2026

Tracked Since Mar 27, 2026