Technology · Open-Xchange
Open-Xchange Dovecot Pro vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 28 vulnerabilities in Open-Xchange Dovecot Pro: 0 in the last 7 days and 19 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-73209, was published on 28 August 2026.
- Last 7 days
- 0
- Last 90 days
- 19
- Critical, all time
- 1
- Exploited in the wild
- 0
About Open-Xchange Dovecot Pro
An enterprise-grade IMAP and POP3 server software designed for high-performance email infrastructure.
Latest Open-Xchange Dovecot Pro vulnerabilities
- CVE-2026-73209: Open-Xchange Dovecot stack exhaustion denial of servicemediumCVSS 6.5EPSS 0.4%
- CVE-2026-73208: Open-Xchange Dovecot OAuth2 token scope validation bypasshighCVSS 7.4EPSS 0.3%
- CVE-2026-52687: Open-Xchange Dovecot denial of service via IMAP compressionmediumCVSS 6.5EPSS 0.4%
- CVE-2026-52681: Open-Xchange Dovecot Sieve CPU resource accounting bypasslowCVSS 3.1EPSS 0.3%
- CVE-2026-42395: Open-Xchange Dovecot denial of service via NUL byte in trusted proxy forwardingmediumCVSS 4.3EPSS 0.2%
- CVE-2026-42392: Open-Xchange Dovecot information disclosure in IMAP URLFETCHmediumCVSS 4.3EPSS 0.3%
- CVE-2026-42391: OX Dovecot Pro denial of service via malformed IMAP ID commandhighCVSS 7.5EPSS 0.5%
- CVE-2026-42008: Open-Xchange Dovecot trusted proxy authentication bypassmediumCVSS 4.3EPSS 0.3%
- CVE-2026-42007: Open-Xchange Dovecot use-after-free in Sieve editheader extensioncriticalCVSS 9.1EPSS 0.4%
- CVE-2026-40205: Open-Xchange Dovecot OAuth2 scope validation bypassmediumCVSS 5.9EPSS 0.2%
- CVE-2026-40204: Open-Xchange Dovecot authentication bypasslowCVSS 3.1EPSS 0.2%
- CVE-2026-40203: Open-Xchange Dovecot IMAP compression information disclosurelowCVSS 3.7EPSS 0.3%
- CVE-2026-40019: Open-Xchange Dovecot ManageSieve infinite loop denial of servicemediumCVSS 5.9EPSS 0.4%
- CVE-2026-40018: Open-Xchange Dovecot authentication bypasshighCVSS 7.4EPSS 0.3%
- CVE-2026-40015: Open-Xchange Dovecot IMAP hibernation denial of servicemediumCVSS 4.3EPSS 0.4%
- CVE-2026-33607: Open-Xchange Dovecot CPU exhaustion in IMAP LISTmediumCVSS 4.3EPSS 0.4%
- CVE-2026-33606: Open-Xchange Dovecot dsync protocol injection via mail contentmediumCVSS 4.8EPSS 0.3%
- CVE-2026-33605: Dovecot ManageSieve denial of service via malformed pre-auth commandhighCVSS 7.5EPSS 0.5%
- CVE-2026-33263: OX Dovecot submission-login denial of service via file descriptor handlingmediumCVSS 4.3EPSS 0.4%
- CVE-2026-42006: Open-Xchange Dovecot uncontrolled memory consumption in IMAPmediumCVSS 4.3EPSS 0.0%
- CVE-2026-40020: Open-Xchange Dovecot improper access control in IMAP SETACLlowCVSS 3.1EPSS 0.0%
- CVE-2026-40016: Open-Xchange Dovecot CPU limit bypass in Sieve scriptsmediumCVSS 5.3EPSS 0.0%
- CVE-2026-33603: Open-Xchange Dovecot SCRAM TLS channel binding spoofingmediumCVSS 6.8EPSS 0.0%
- CVE-2026-27851: Open-Xchange Dovecot injection via unsafe variable expansionhighCVSS 7.4EPSS 0.0%
- CVE-2026-27858: Open-Xchange Dovecot denial of service in ManageSievehighCVSS 7.5EPSS 0.5%
Most severe Open-Xchange Dovecot Pro vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-42007: Open-Xchange Dovecot use-after-free in Sieve editheader extensioncriticalCVSS 9.1EPSS 0.4%
- CVE-2026-42391: OX Dovecot Pro denial of service via malformed IMAP ID commandhighCVSS 7.5EPSS 0.5%
- CVE-2026-33605: Dovecot ManageSieve denial of service via malformed pre-auth commandhighCVSS 7.5EPSS 0.5%
- CVE-2026-27858: Open-Xchange Dovecot denial of service in ManageSievehighCVSS 7.5EPSS 0.5%
- CVE-2025-59032: Open-Xchange Dovecot denial of service in ManageSieve AUTHENTICATEhighCVSS 7.5EPSS 0.4%
- CVE-2026-40018: Open-Xchange Dovecot authentication bypasshighCVSS 7.4EPSS 0.3%
- CVE-2026-73208: Open-Xchange Dovecot OAuth2 token scope validation bypasshighCVSS 7.4EPSS 0.3%
- CVE-2026-27856: Dovecot Doveadm timing oracle vulnerability in credential verificationhighCVSS 7.4EPSS 0.3%
- CVE-2026-27851: Open-Xchange Dovecot injection via unsafe variable expansionhighCVSS 7.4EPSS 0.0%
- CVE-2026-33603: Open-Xchange Dovecot SCRAM TLS channel binding spoofingmediumCVSS 6.8EPSS 0.0%
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 19 | 1 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/dovecot-pro.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Open-Xchange Dovecot Pro vulnerabilities", https://junglewise.ai/threats/technologies/dovecot-pro, 26 September 2026.