CVE-2026-123621highCWE-22

CVE-2026-123621: high-severity vulnerability in webmin usermin

Usermin through 2.570 Path Traversal File Write via detachall.cgi

Published

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.6epss 1.0%
Usermin through 2.570 contains a path traversal vulnerability in mailbox/detachall.cgi that allows remote unauthenticated attackers to write files outside the temporary directory via unsanitized attachment filenames. Attackers can email attachments with ../ sequences in filenames, and when the recipient downloads all attachments, files like ~/.forward are overwritten, enabling command execution.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
webmin · usermin
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CVE-2026-123620HIGHUsermin through 2.570 OS Command Injection via Read Mail IMAP Folder DeletionEPSS 1.4%CVE-2026-123622MEDIUMUsermin through 2.570 XSS via mailbox detach.cgi type ParameterEPSS 0.3%