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CVE-2026-74997

CVSS 8.8 · High EPSS 0.77% · P53

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProductVersion RangeStatus
RoundcubeWebmail1.6.0< 1.6.18affected
1.7.0< 1.7.3affected
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I. Basic Information for CVE-2026-74997

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the cmd_learn driver of the markasjunk plugin is subject to remote code execution via crafted placeholder replacement values. This issue only affects Roundcube instances using the markasjunk plugin with its cmd_learn driver.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Roundcube Webmail 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Roundcube Webmail是Roundcube团队开源的一款Web邮件客户端软件。 Roundcube Webmail 1.6.18之前版本和1.7.3版本之前的1.7.x版本存在命令注入漏洞，该漏洞源于markasjunk插件的cmd_learn驱动程序对特制占位符替换值的处理不当，可能导致远程代码执行。
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

VendorProductAffected VersionsCPESubscribe
RoundcubeWebmail 1.6.0 ~ 1.6.18 -

II. Public POCs for CVE-2026-74997

#POC DescriptionSource LinkShenlong Link
AI-Generated POCVerified env Premium
Reproduced successfully in a real sandbox· Below is the actual recording of building the environment and exploiting the vulnerability.
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claude_code · 14717 chars
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III. Intelligence Information for CVE-2026-74997

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Patches & Fixes for CVE-2026-74997 (4)

Vendor Advisories for CVE-2026-74997 (1)

Vendor Pages for CVE-2026-74997 (1)

Same Patch Batch · Roundcube · 2026-08-17 · 10 CVEs total

CVE-2026-749987.2 HIGHRoundcube Webmail 跨站脚本漏洞
CVE-2026-750027.1 HIGHRoundcube Webmail 命令注入漏洞
CVE-2026-750106.4 MEDIUMRoundcube Webmail 权限许可和访问控制问题漏洞
CVE-2026-750005.8 MEDIUMRoundcube Webmail 权限许可和访问控制问题漏洞
CVE-2026-750035.8 MEDIUMRoundcube Webmail 权限许可和访问控制问题漏洞
CVE-2026-750065.8 MEDIUMRoundcube Webmail 服务端请求伪造漏洞
CVE-2026-749995.4 MEDIUMRoundcube Webmail 跨站脚本漏洞
CVE-2026-750075.4 MEDIUMRoundcube Webmail 命令注入漏洞
CVE-2026-750044.3 MEDIUMRoundcube Webmail 命令注入漏洞

IV. Related Vulnerabilities

Same product: Webmail
Same vendor: Roundcube
Same weakness: CWE-78

V. Comments for CVE-2026-74997

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