CVE-2026-42392
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.
以下是该漏洞描述的中文翻译： 拥有有效凭证的攻击者可以发送无效的 IMAP URLFETCH 命令，这会导致未初始化的内存内容被包含在返回给客户端的错误响应中。进程内存中的内容可能会泄露给客户端，其中可能包含敏感数据。建议禁用 IMAP URLAUTH 功能，并更新至非漏洞版本。目前尚无已知的公开利用方式。
Possible ATT&CK Techniques 1 AI
T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2026-42392
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 an invalid IMAP URLFETCH command, which causes uninitialized memory to be included in the error response returned to the client. Process memory contents can be disclosed to the client, which may include sensitive data. Disable the IMAP URLAUTH functionality. 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:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Open-Xchange GmbH | OX Dovecot Pro | 2.3.0 ~ 3.1.6 | - |
|
| Open-Xchange GmbH | OX Dovecot CE | 2.3.0 ~ 2.4.5 | - |
|
II. Public POCs for CVE-2026-42392
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
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Same Patch Batch · Open-Xchange GmbH · 2026-08-28 · 25 CVEs total
| CVE-2026-42007 | 9.1 CRITICAL | OpenWebmail 6.0 及之前版本 内存越界写漏洞 |
| CVE-2026-42391 | 7.5 HIGH | IMAP未认证ID命令引发内存与CPU资源耗尽 |
| CVE-2026-33605 | 7.5 HIGH | ManageSieve 认证前畸形命令崩溃DoS漏洞 |
| CVE-2026-27852 | 7.5 HIGH | Dovecot 特定版本 IMAP 邮件解析内存耗尽 DoS |
| CVE-2026-73208 | 7.4 HIGH | Dovecot OAuth2 audience 冒充 scope 导致越权 |
| CVE-2026-40018 | 7.4 HIGH | 未知软件：无已知公开利用 |
| CVE-2026-73209 | 6.5 MEDIUM | IMAP服务栈溢出拒绝服务漏洞 |
| CVE-2026-40017 | 6.5 MEDIUM | Dovecot特定版本IMAP THREAD命令哈希碰撞DoS漏洞 |
| CVE-2026-40014 | 6.5 MEDIUM | IMAP THREAD命令致高CPU占用，修复指定版本 |
| CVE-2026-52687 | 6.5 MEDIUM | Dovecot IMAP压缩算法致拒绝服务 |
| CVE-2026-33604 | 5.9 MEDIUM | Dovecot SMTP邮件走私漏洞 |
| CVE-2026-40019 | 5.9 MEDIUM | ManageSieve 0.6.1 存在 CPU 耗尽型拒绝服务漏洞 |
| CVE-2026-40205 | 5.9 MEDIUM | OAuth2 令牌校验缺陷，远程验证未强制作用域 |
| CVE-2026-33606 | 4.8 MEDIUM | Dovecot dsync流协议邮件内容注入漏洞 |
| CVE-2026-33263 | 4.3 MEDIUM | 提交登录模块崩溃：高并发下连接上限触发 epoll 异常 |
| CVE-2026-42395 | 4.3 MEDIUM | OpenSSH可信代理NUL字节致登录进程崩溃 |
| CVE-2026-33607 | 4.3 MEDIUM | IMAP LIST命令致CPU耗尽或DoS |
| CVE-2026-40015 | 4.3 MEDIUM | IMAP-hibernate越界读致进程崩溃 |
| CVE-2026-40013 | 4.3 MEDIUM | ManageSieve 越界写导致拒绝服务漏洞 |
| CVE-2026-42008 | 4.3 MEDIUM | Dovecot 受信代理认证字段注入漏洞 |
Showing top 20 of 25 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same weakness: CWE-200
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CVE-2026-40203
IMAP压缩导致响应泄露：需禁用并更新版本 -
CVE-2026-61802
Wazuh discloses cleartext cluster key to low-privilege API u -
CVE-2026-78174
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V. Comments for CVE-2026-42392
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