Vulnerability DatabaseCVE-2026-123620
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CVE-2026-123620
Published:November 06, 2026
Updated:November 09, 2026
Usermin through 2.570 contains an OS command injection vulnerability in the Read Mail module that allows authenticated users to execute commands through unsanitized IMAP folder names. Attackers can create a folder containing shell metacharacters via an external IMAP client, then delete it in Usermin to run commands as their system account, bypassing webmail-only restrictions.
Related Resources (8)
https://www.vulncheck.com/advisories/usermin-through-2.570-os-command-injection-via-read-mail-imap-folder-deletion
https://nvd.nist.gov/vuln/detail/CVE-2026-123620
https://github.com/webmin/usermin/blob/2.570/mailbox/mailbox-lib.pl#L1031-L1040
https://github.com/webmin/usermin/issues/142
https://github.com/webmin/usermin
https://hackmd.io/@leediay/H144QKY6zl
https://github.com/webmin/usermin/commit/8a45420282ff04c943f05d9241a3c55afb9bca79
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123620.json
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CVSS v4
Base Score:
7.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Improper Neutralization of Special Elements used in an OS Command
CWE-78
EPSS
Base Score:
1.38