VulnerabilityModified

CVE-2025-59032

ManageSieve AUTHENTICATE command crashes when using literal as SASL initial response.

HIGH 7.5EPSS 0.73%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.73%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.73% probability · 54th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-20, CWE-229
Affected: dovecot/dovecot · open-xchange/dovecot
Source: security@open-xchange.com

EPSS trend

EPSS 0.7% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.