OS Command Injection in Webmin by Vendor Webmin
CVE-2026-125391

8.6HIGH

Key Information:

Vendor

Webmin

Status
Webmin
Vendor
CVE Published:
9 November 2026

What is CVE-2026-125391?

Webmin versions up to 2.670 have a vulnerability in samba/save_euser.cgi that permits authenticated Samba user maintainers to exploit the opts parameter. By injecting shell metacharacters into account option flags used by create_user and modify_user functions, an attacker can execute arbitrary commands with root privileges. This flaw poses a significant risk as it allows unauthorized command execution on the server, potentially leading to further compromises.

Affected Version(s)

webmin 0 <= 2.670

References

https://github.com/webmin/webmin/commit/18cab89b1fc74ab7e...
patch
https://github.com/webmin/webmin
product
https://github.com/webmin/webmin/blob/2.670/samba/samba-l...
technical-description

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Sakil Ahamed Gayen
Ilia Ross
.