Improper input validation in Dovecot and OX Dovecot Pro - CVE-2025-59032
Published: April 1, 2026
Vulnerability identifier: #VU124722
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-59032
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Dovecot
Affected software:
Dovecot
OX Dovecot Pro
Dovecot
OX Dovecot Pro
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper input validation in Pigeonhole ManageSieve service when processing SASL AUTHENTICATE command. A remote attacker can send a specially crafted request using literal as SASL initial response to cause a denial of service.
The ManageSieve service crashes and becomes unavailable for other users.
How to mitigate CVE-2025-59032
Install security update from vendor's website.