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.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact High

Subsequent System Availability Impact High

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Webmin Webmin unaffected
Version Status Constraints
0 affected < 2.640

No data.

No data.

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No data.

Project Subscriptions

Vendors Products
Webmin Subscribe
Webmin Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/webmin/webmin/commit/cf432879a14568c4bb44cd2f9e5a9bd0e168edc1 cve-icon cve-icon
https://github.com/webmin/webmin/compare/2.630...2.640 cve-icon cve-icon
History

Wed, 27 May 2026 21:30:00 +0000

Type Values Removed Values Added
Title Unsafely Constructed Filename in Webmin Mailbox Attachment Saving Leads to Remote Code Execution

Wed, 27 May 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Wed, 27 May 2026 15:15:00 +0000

Type Values Removed Values Added
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.
First Time appeared Webmin
Webmin webmin
Weaknesses CWE-24
CPEs cpe:2.3:a:webmin:webmin:*:*:*:*:*:*:*:*
Vendors & Products Webmin
Webmin webmin
References
Metrics cvssV4_0

{'score': 9.4, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-05-27T16:14:12.073Z

Reserved: 2026-05-27T14:37:18.174Z

Link: CVE-2026-49103

cve-icon Vulnrichment

Updated: 2026-05-27T16:14:09.539Z

cve-icon NVD

Status : Deferred

Published: 2026-05-27T15:16:34.170

Modified: 2026-05-27T19:49:48.143

Link: CVE-2026-49103

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-27T21:15:25Z

Weaknesses