What’s Vulnerable › Vulnerabilities

CVE-2025-59032

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-27 · updated 2026-10-07
• Weakness: CWE-20

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.

Affected products

• dovecot: before 2.4.3 — fixed in 2.4.3
• Open-Xchange Dovecot: before 3.1.3 — fixed in 3.1.3

How to fix

Upgrade to a fixed version: dovecot 2.4.3; Open-Xchange Dovecot 3.1.3. Check the vendor advisory for mitigations.

References

• https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.json
• https://access.redhat.com/errata/RHSA-2026:13498
• https://access.redhat.com/errata/RHSA-2026:13830
• https://access.redhat.com/errata/RHSA-2026:13857
• https://access.redhat.com/errata/RHSA-2026:17602
• https://access.redhat.com/errata/RHSA-2026:17625
• https://access.redhat.com/errata/RHSA-2026:17626
• https://access.redhat.com/errata/RHSA-2026:17628
• https://access.redhat.com/errata/RHSA-2026:17630
• https://access.redhat.com/errata/RHSA-2026:18053
• https://access.redhat.com/errata/RHSA-2026:19149
• https://access.redhat.com/errata/RHSA-2026:19364

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