CVE-2025-59032: Open-Xchange OX Dovecot Pro · Improper Input Validation
Affects Open-Xchange OX Dovecot ProSource CVE Database V5
Not known to be exploited · CVSS 7.5 High.
Data as of 29 Oct 2026, 19:04 UTC
- EPSS
- 0.7% chance of exploitation in 30 days – higher than 54% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 27 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Open-Xchange GmbHOX Dovecot Pro | Affected
| Fixed in– |
AI-suggested
Red Hat has released official security updates that fix this vulnerability in their Extended Life Cycle Support 7 packages. Applying these updates will remediate the issue. Until patched, controlling access to the ManageSieve port or disabling the ManageSieve service if not needed can mitigate the risk. No public exploits are known, reducing immediate urgency but patching is recommended.
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.
References
- documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.json (opens in a new tab)
- access.redhat.com/security/cve/CVE-2025-59032 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2452172 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-59032.json (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:26564 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:17602 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:13498 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:19149 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:13830 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:19455 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:19453 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:18053 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:17630 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:17628 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:17625 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:17626 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:13857 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:19364 (opens in a new tab)