CVE-2026-73209
Quick assessment
Affected
Open-Xchange GmbH OX Dovecot Pro
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Open-Xchange Dovecot Pro是德国Open-Xchange公司的一个邮件服务器软件。 Open-Xchange Dovecot Pro 2.3.0至2.3.22.2之前版本、3.0.0至3.0.7之前版本、3.1.0至3.1.6之前版本和OX Dovecot CE 2.3.0至2.4.5之前版本存在资源管理错误漏洞，该漏洞源于对特制压缩数据处理不当，可能导致进程栈耗尽并崩溃，从而造成IMAP服务降级或拒绝服务。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 4
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Open-Xchange GmbH | OX Dovecot CE | 2.3.0< 2.4.5 |
affected |
| Open-Xchange GmbH | OX Dovecot Pro | 2.3.0< 2.3.22.2 |
affected |
3.0.0< 3.0.7 |
affected | ||
3.1.0< 3.1.6 |
affected |
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I. Basic Information for CVE-2026-73209
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An attacker that has valid credentials can send crafted compressed data that causes the affected process to exhaust its stack and crash. The affected process is terminated, which can cause degradation or denial of service for IMAP. Update to non-vulnerable version. No publicly available exploits are known.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的递归
Source: CVE Program / CVE List V5
Vulnerability Title
Open-Xchange Dovecot Pro 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open-Xchange Dovecot Pro是德国Open-Xchange公司的一个邮件服务器软件。 Open-Xchange Dovecot Pro 2.3.0至2.3.22.2之前版本、3.0.0至3.0.7之前版本、3.1.0至3.1.6之前版本和OX Dovecot CE 2.3.0至2.4.5之前版本存在资源管理错误漏洞，该漏洞源于对特制压缩数据处理不当，可能导致进程栈耗尽并崩溃，从而造成IMAP服务降级或拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Open-Xchange GmbH | OX Dovecot Pro | 2.3.0 ~ 2.3.22.2 | - |
|
| Open-Xchange GmbH | OX Dovecot CE | 2.3.0 ~ 2.4.5 | - |
|
II. Public POCs for CVE-2026-73209
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Same Patch Batch · Open-Xchange GmbH · 2026-08-28 · 25 CVEs total
| CVE-2026-42007 | 9.1 CRITICAL | Open-Xchange Dovecot Pro 资源管理错误漏洞 |
| CVE-2026-42391 | 7.5 HIGH | Open-Xchange Dovecot Pro 资源管理错误漏洞 |
| CVE-2026-27852 | 7.5 HIGH | Open-Xchange Dovecot Pro 资源管理错误漏洞 |
| CVE-2026-33605 | 7.5 HIGH | Open-Xchange Dovecot Pro 资源管理错误漏洞 |
| CVE-2026-40018 | 7.4 HIGH | Open-Xchange Dovecot Pro SQL注入漏洞 |
| CVE-2026-73208 | 7.4 HIGH | Open-Xchange Dovecot Pro 授权问题漏洞 |
| CVE-2026-52687 | 6.5 MEDIUM | Open-Xchange Dovecot Pro 资源管理错误漏洞 |
| CVE-2026-40014 | 6.5 MEDIUM | Open-Xchange Dovecot Pro 资源管理错误漏洞 |
| CVE-2026-40017 | 6.5 MEDIUM | Open-Xchange Dovecot Pro 资源管理错误漏洞 |
| CVE-2026-33604 | 5.9 MEDIUM | Open-Xchange Dovecot Pro 安全漏洞 |
| CVE-2026-40019 | 5.9 MEDIUM | Open-Xchange GmbH OX Dovecot CE 资源管理错误漏洞 |
| CVE-2026-40205 | 5.9 MEDIUM | Open-Xchange Dovecot Pro 授权问题漏洞 |
| CVE-2026-33606 | 4.8 MEDIUM | Open-Xchange Dovecot Pro 输入验证错误漏洞 |
| CVE-2026-42008 | 4.3 MEDIUM | Open-Xchange Dovecot Pro 授权问题漏洞 |
| CVE-2026-33607 | 4.3 MEDIUM | Open-Xchange Dovecot Pro 资源管理错误漏洞 |
| CVE-2026-33263 | 4.3 MEDIUM | Open-Xchange Dovecot Pro 资源管理错误漏洞 |
| CVE-2026-40015 | 4.3 MEDIUM | Open-Xchange Dovecot Pro 缓冲区错误漏洞 |
| CVE-2026-40013 | 4.3 MEDIUM | Open-Xchange Dovecot Pro 缓冲区错误漏洞 |
| CVE-2026-42392 | 4.3 MEDIUM | Open-Xchange Dovecot Pro 信息泄露漏洞 |
| CVE-2026-42395 | 4.3 MEDIUM | Open-Xchange Dovecot Pro 资源管理错误漏洞 |
Showing top 20 of 25 CVEs. View all on vendor page → →
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V. Comments for CVE-2026-73209
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