CVE-2025-59032

HighCVSS 7.5

Published: 27/03/2026(UTC)Updated: 15/07/2026(UTC)Translated: 16/07/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.70%

49th percentile - higher than 49% of all known CVEs

Summary

A vulnerability in ManageSieve causes the service to crash when processing the AUTHENTICATE command with a literal as the SASL initial response. This can be exploited to repeatedly crash the service, making it unavailable for other users.

Risk Assessment

The risk is a potential Denial of Service (DoS) attack on the ManageSieve service, which could prevent all users from managing email filtering rules.

Recommendation

It is recommended to restrict access to the ManageSieve port or disable the service if not needed. Alternatively, upgrade to a patched version.

Other vulnerabilities in ManageSieve

CVE-2026-27858High
A vulnerability in managesieve allows an attacker to send a specially crafted message before authentication, causing excessive memory allocation. This can crash the managesieve-login process and make the protocol unavailable.

Original NVD description (English source)

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.