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CVE-2026-49103

Quick assessment

Affected
Webmin Webmin
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.

Webmin是Webmin社区的一套基于Web的用于类Unix操作系统中的系统管理工具。 Webmin 2.640之前版本存在安全漏洞，该漏洞源于mailboxes组件中mailboxes/detachall.cgi未安全构建附件保存文件名。

AI Predicted 9.8 Difficulty: Trivial EPSS 0.45% · P37

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Webmin Webmin < 2.640 affected
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I. Basic Information for CVE-2026-49103

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Webmin before 2.640 does not safely construct a filename for saving of an attachment within the mailboxes component. This occurs in mailboxes/detachall.cgi.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
路径遍历：’../filedir’
Source: CVE Program / CVE List V5
Vulnerability Title
Webmin 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Webmin是Webmin社区的一套基于Web的用于类Unix操作系统中的系统管理工具。 Webmin 2.640之前版本存在安全漏洞，该漏洞源于mailboxes组件中mailboxes/detachall.cgi未安全构建附件保存文件名。
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
Webmin Webmin 0 ~ 2.640 -

II. Public POCs for CVE-2026-49103

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III. Intelligence Information for CVE-2026-49103

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Patches & Fixes for CVE-2026-49103 (2)

IV. Related Vulnerabilities

Same product: Webmin
Same vendor: Webmin
Same weakness: CWE-24

V. Comments for CVE-2026-49103

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