CVE-2025-59028
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 OX Dovecot Pro是德国Open-Xchange公司的一个邮件存储与投递系统。 Open-Xchange OX Dovecot Pro存在安全漏洞，该漏洞源于发送无效base64 SASL数据时断开与认证服务器的连接，可能导致拒绝服务攻击。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2025-59028
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
When sending invalid base64 SASL data, login process is disconnected from the auth server, causing all active authentication sessions to fail. Invalid BASE64 data can be used to DoS a vulnerable server to break concurrent logins. Install fixed version or disable concurrency in login processes (heavy perfomance penalty on large deployments). No publicly available exploits are known.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Open-Xchange OX Dovecot Pro 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open-Xchange OX Dovecot Pro是德国Open-Xchange公司的一个邮件存储与投递系统。 Open-Xchange OX Dovecot Pro存在安全漏洞，该漏洞源于发送无效base64 SASL数据时断开与认证服务器的连接，可能导致拒绝服务攻击。
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 | 0 ~ 3.1.0 | - |
|
II. Public POCs for CVE-2025-59028
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Same Patch Batch · Open-Xchange GmbH · 2026-03-27 · 11 CVEs total
| CVE-2026-24031 | 7.7 HIGH | Open-Xchange OX Dovecot Pro 安全漏洞 |
| CVE-2026-27858 | 7.5 HIGH | Open-Xchange OX Dovecot Pro 安全漏洞 |
| CVE-2025-59032 | 7.5 HIGH | Open-Xchange OX Dovecot Pro 安全漏洞 |
| CVE-2026-27856 | 7.4 HIGH | Open-Xchange OX Dovecot Pro 安全漏洞 |
| CVE-2026-27855 | 6.8 MEDIUM | Open-Xchange OX Dovecot Pro 安全漏洞 |
| CVE-2026-0394 | 5.3 MEDIUM | Open-Xchange OX Dovecot Pro 安全漏洞 |
| CVE-2026-27859 | 5.3 MEDIUM | Open-Xchange OX Dovecot Pro 安全漏洞 |
| CVE-2026-27857 | 4.3 MEDIUM | Open-Xchange OX Dovecot Pro 安全漏洞 |
| CVE-2025-59031 | 4.3 MEDIUM | Open-Xchange OX Dovecot Pro 安全漏洞 |
| CVE-2026-27860 | 3.7 LOW | Open-Xchange OX Dovecot Pro 安全漏洞 |
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V. Comments for CVE-2025-59028
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