CVE-2025-59032

dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command

Published Mar 27, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4556-1 dovecot security update
Debian DSA Debian DSA DSA-6197-1 dovecot security update
Debian DSA Debian DSA DSA-6197-2 dovecot regression update
Ubuntu USN Ubuntu USN USN-8136-1 Dovecot vulnerabilities
History
Type Values Removed Values Added
First Time appeared Dovecot
Dovecot dovecot
Open-xchange dovecot
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:*
cpe:2.3:a:open-xchange:dovecot:*:*:*:*:pro:*:*:*
Vendors & Products Dovecot
Dovecot dovecot
Open-xchange dovecot
Type Values Removed Values Added
Title ManageSieve AUTHENTICATE Crash Causing Denial of Service in OX Dovecot Pro dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command
Weaknesses CWE-229
References
Metrics threat_severity

None

threat_severity

Important

Type Values Removed Values Added
First Time appeared Open-xchange
Open-xchange ox Dovecot Pro
Vendors & Products Open-xchange
Open-xchange ox Dovecot Pro
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title ManageSieve AUTHENTICATE Crash Causing Denial of Service in OX Dovecot Pro
Type Values Removed Values Added
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.
Weaknesses CWE-20
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Sources

Status
PUBLISHED
Assigner
OX
Published
Updated
Jul 15, 2026, 1:25 AM
Reserved
Sep 8, 2025, 2:22 PM
Status
Modified
Published
Mar 27, 2026, 9:16 AM
Modified
Oct 7, 2026, 9:10 AM
Severity
Important
Public date
Mar 27, 2026, 8:10 AM